Prosecution Insights
Last updated: May 04, 2026
Application No. 18/176,106

HORIZONTAL FEDERATED REGRESSION RANDOM FOREST WITH SECURE AGGREGATION

Final Rejection §101§102§103
Filed
Feb 28, 2023
Examiner
WERNER, MARSHALL L
Art Unit
2125
Tech Center
2100 — Computer Architecture & Software
Assignee
DELL PRODUCTS, L.P.
OA Round
2 (Final)
66%
Grant Probability
Favorable
3-4
OA Rounds
7m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allowance Rate
135 granted / 204 resolved
+11.2% vs TC avg
Strong +45% interview lift
Without
With
+44.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
56 currently pending
Career history
260
Total Applications
across all art units

Statute-Specific Performance

§101
28.9%
-11.1% vs TC avg
§103
37.7%
-2.3% vs TC avg
§102
8.5%
-31.5% vs TC avg
§112
20.9%
-19.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 204 resolved cases

Office Action

§101 §102 §103
DETAILED ACTION This action is in response to the Applicant Response filed 28 February 2023 for application 18/176,106 filed 28 February 2023. Claim(s) 1-20 is/are pending. Claim(s) 1-20 is/are rejected. Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. Claim(s) 1-20 is/are rejected under 35 U.S.C. 101, because the claim(s) is/are directed to an abstract idea, and because the claim elements, whether considered individually or in combination, do not amount to significantly more than the abstract idea, see Alice Corporation Pty. Ltd. V. CLS Bank International et al., 573 US 208 (2014). Regarding claim 1, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 1 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The limitation of determining a global variance for each of the splits at a central node, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. The limitation of selecting a split with a lowest global variance from among the global variances, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. The limitation of setting the selected split at the node of the decision tree at each of the edge nodes, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites additional element(s) – multiple edge nodes, central node. The additional element(s) is/are recited at a high-level of generality (i.e., as generic computer components performing generic computer functions of executing instructions on the computers) such that it amounts to no more than mere instructions to apply the exception using generic computer components (MPEP 2106.05(b)). The claim recites additional element(s) – decision tree. The additional element(s) is/are recited at a high-level of generality such that it amounts to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)). The claim recites receiving federated variance data from multiple edge nodes for each of multiple splits, wherein each split is associated with a node of a decision tree, which is simply acquiring data recited at a high level of generality. This is nothing more than insignificant extra-solution activity (MPEP 2106.05(g)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: multiple edge nodes amount(s) to no more than mere instructions to apply the exception using generic computer components (MPEP 2106.05(b)) acquiring data amount(s) to no more than insignificant extra-solution activity (MPEP 2106.05(g)), wherein the insignificant extra-solution activity is the well-understood routine and conventional activit(y/ies) of receiving or transmitting data over a network and/or storing and retrieving information in memory (MPEP 2016.05(d)) decision tree amount(s) to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 2, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 2 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The limitation of generating the federated variance data at each of the edge nodes, wherein each of the edge nodes generates the federated variance data based on their own local data, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 3, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 3 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 2 is applicable here since claim 3 carries out the method of claim 2 but for the recitation of additional element(s) of wherein the local data of the edges nodes is not shared with other edge nodes or with a central node. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the edge nodes and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the edge nodes do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 4, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 4 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 2 is applicable here since claim 4 carries out the method of claim 2 but for the recitation of additional element(s) of wherein each of the edge nodes generates the federated variance data for each of multiple splits, wherein the multiple splits are the same at each of the edge nodes. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the edge nodes and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the edge nodes do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 5, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 5 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 1 is applicable here since claim 5 carries out the method of claim 1 but for the recitation of additional element(s) of wherein the federated variance data includes a local cardinality for each of the feature splits, a local sum of the feature splits, and a local sum of squares of the feature splits. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the federated variance data and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the federated variance data do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 6, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 6 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The limitation of aggregating the federated variance data at the central node, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 7, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 7 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 1 is applicable here since claim 7 carries out the method of claim 1 but for the recitation of additional element(s) of wherein the lowest global variance represents a best purity for the split. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the global variance data and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the global variance data do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 8, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 8 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The limitation of constructing multiple decision trees that are the same at each of the edge nodes, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 9, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 9 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 8 is applicable here since claim 9 carries out the method of claim 8 but for the recitation of additional element(s) of wherein the multiple decision trees constitute a random forest regressor. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites wherein the multiple decision trees constitute a random forest regressor which is simply additional information regarding the decision trees, and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). The claim recites additional element(s) – random forest regressor. The additional element(s) is/are recited at a high-level of generality such that it amounts to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: random forest regressor amount(s) to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)) additional information regarding the decision trees do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 10, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 10 is directed to a method, which is directed to a process, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) method. The Step 2A Prong One Analysis for claim 1 is applicable here since claim 10 carries out the method of claim 1 but for the recitation of additional element(s) of sharing values for constructing each feature split for all features. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites sharing values for constructing each feature split for all features, which is simply transmitting data recited at a high level of generality. This is nothing more than insignificant extra-solution activity (MPEP 2106.05(g)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: transmitting data amount(s) to no more than insignificant extra-solution activity (MPEP 2106.05(g)), wherein the insignificant extra-solution activity is the well-understood routine and conventional activit(y/ies) of receiving or transmitting data over a network and/or storing and retrieving information in memory (MPEP 2016.05(d)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 11, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 11 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The limitation of determining a global variance for each of the splits at a central node, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. The limitation of selecting a split with a lowest global variance from among the global variances, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. The limitation of setting the selected split at the node of the decision tree at each of the edge nodes, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites additional element(s) – storage medium, instructions, one or more hardware processors, multiple edge nodes, central node. The additional element(s) is/are recited at a high-level of generality (i.e., as generic computer components performing generic computer functions of executing instructions on the computers) such that it amounts to no more than mere instructions to apply the exception using generic computer components (MPEP 2106.05(b)). The claim recites additional element(s) – decision tree. The additional element(s) is/are recited at a high-level of generality such that it amounts to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)). The claim recites receiving federated variance data from multiple edge nodes for each of multiple splits, wherein each split is associated with a node of a decision tree, which is simply acquiring data recited at a high level of generality. This is nothing more than insignificant extra-solution activity (MPEP 2106.05(g)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: storage medium, instructions, one or more hardware processors, multiple edge nodes amount(s) to no more than mere instructions to apply the exception using generic computer components (MPEP 2106.05(b)) acquiring data amount(s) to no more than insignificant extra-solution activity (MPEP 2106.05(g)), wherein the insignificant extra-solution activity is the well-understood routine and conventional activit(y/ies) of receiving or transmitting data over a network and/or storing and retrieving information in memory (MPEP 2016.05(d)) decision tree amount(s) to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 12, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 12 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The limitation of generating the federated variance data at each of the edge nodes, wherein each of the edge nodes generates the federated variance data based on their own local data, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 13, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 13 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 12 is applicable here since claim 13 carries out the storage medium of claim 12 but for the recitation of additional element(s) of wherein the local data of the edges nodes is not shared with other edge nodes or with a central node. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the edge nodes and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the edge nodes do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 14, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 14 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 12 is applicable here since claim 14 carries out the storage medium of claim 12 but for the recitation of additional element(s) of wherein each of the edge nodes generates the federated variance data for each of multiple splits, wherein the multiple splits are the same at each of the edge nodes. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the edge nodes and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the edge nodes do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 15, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 15 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 11 is applicable here since claim 15 carries out the storage medium of claim 11 but for the recitation of additional element(s) of wherein the federated variance data includes a local cardinality for each of the feature splits, a local sum of the feature splits, and a local sum of squares of the feature splits. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the federated variance data and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the federated variance data do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 16, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 16 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The limitation of aggregating the federated variance data at the central node, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 17, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 17 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 11 is applicable here since claim 17 carries out the storage medium of claim 11 but for the recitation of additional element(s) of wherein the lowest global variance represents a best purity for the split. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. In particular, the claim recites additional information regarding the global variance data and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of additional information regarding the global variance data do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). Not applying the exception in a meaningful way does not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 18, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 18 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The limitation of constructing multiple decision trees that are the same at each of the edge nodes, as drafted, is a process that, under its broadest reasonable interpretation, covers a mental process. The limitation is directed to observation, evaluation, judgment and opinion and is a process capable of being performed by a human mentally or using pen and paper. If a claim limitation, under its broadest reasonable interpretation, covers performance of the limitation in the mind, then it falls within the "Mental Processes" grouping. Accordingly, the claim recites an abstract idea. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim does not recite any additional elements which integrate the abstract idea into a practical application and, therefore, does not impose any meaningful limits on practicing the abstract idea. Therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the claim does not recite any additional elements which provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 19, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 19 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 18 is applicable here since claim 19 carries out the storage medium of claim 18 but for the recitation of additional element(s) of wherein the multiple decision trees constitute a random forest regressor. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites wherein the multiple decision trees constitute a random forest regressor which is simply additional information regarding the decision trees, and the element(s) do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)). The claim recites additional element(s) – random forest regressor. The additional element(s) is/are recited at a high-level of generality such that it amounts to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: random forest regressor amount(s) to no more than indicating a field of use or technological environment in which to apply the judicial exception (MPEP 2106.05(h)) additional information regarding the decision trees do(es) not apply the exception in a meaningful way (MPEP 2106.05(e)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Regarding claim 20, the claim is rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. Step 1 Analysis: Claim 20 is directed to a storage medium, which is directed to an article of manufacture, one of the statutory categories. Step 2A Prong One Analysis: The claim recites a(n) storage medium. The Step 2A Prong One Analysis for claim 11 is applicable here since claim 20 carries out the storage medium of claim 11 but for the recitation of additional element(s) of sharing values for constructing each feature split for all features. Step 2A Prong Two Analysis: With respect to the abstract idea, the judicial exception is not integrated into a practical application. The claim recites sharing values for constructing each feature split for all features, which is simply transmitting data recited at a high level of generality. This is nothing more than insignificant extra-solution activity (MPEP 2106.05(g)). Accordingly, the additional element(s) do(es) not integrate the abstract idea into a practical application because the additional element(s) do(es) not impose any meaningful limits on practicing the abstract idea, and, therefore, the claim is directed to an abstract idea. Step 2B Analysis: The claim does not include additional elements that are sufficient to amount to significantly more than the judicial exception. As discussed above with respect to the integration of the abstract idea into a practical application, the additional element(s) of: transmitting data amount(s) to no more than insignificant extra-solution activity (MPEP 2106.05(g)), wherein the insignificant extra-solution activity is the well-understood routine and conventional activit(y/ies) of receiving or transmitting data over a network and/or storing and retrieving information in memory (MPEP 2016.05(d)) The additional element(s) do(es) not provide an inventive concept, and, therefore, the claim is not patent eligible. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-8, 10-18, 20 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Liu et al. (US 2022/0230071 A1 – Method and Device for Constructing Decision Tree, hereinafter referred to as “Liu”). Regarding claim 1, Liu teaches a method comprising: receiving federated variance data from multiple edge nodes for each of multiple splits (Liu, [0061]-[0062] – teaches each client sending statistical data, including variance data for a feature, for the local data of the client to a control node; see also Liu, [0051] – perform the step for each attribute to create nodes of a decision tree), wherein each split is associated with a node of a decision tree (Liu, [0051] – teaches each split point generated from the statistical data creates a node of a decision tree); determining a global variance for each of the splits at a central node (Liu, [0065] – teaches determining a global variance based on the aggregated variance data received from the client devices; see also Liu, [0068]); selecting a split with a lowest global variance from among the global variances (Liu, [0067]-[0072] – teaches selecting the split with the lowest impurity); and setting the selected split at the node of the decision tree at each of the edge nodes (Liu, [0074] – teaches sending split point information from the control node to each of the clients). Regarding claim 2, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches generating the federated variance data at each of the edge nodes, wherein each of the edge nodes generates the federated variance data based on their own local data (Liu, [0061]-[0062] – teaches sending statistical data, including variance data for a feature, for the local data of the client to a control node). Regarding claim 3, Liu teaches all of the limitations of the method of claim 2 as noted above. Liu further teaches wherein the local data of the edges nodes is not shared with other edge nodes or with a central node (Liu, [0050] – teaches the local clients do not share the respective local data). Regarding claim 4, Liu teaches all of the limitations of the method of claim 2 as noted above. Liu further teaches wherein each of the edge nodes generates the federated variance data for each of multiple splits (, [0061]-[0062] – teaches each client sending statistical data, including variance data for a feature, for the local data of the client to a control node; see also Liu, [0051] – perform the step for each attribute to create nodes of a decision tree; see also Liu, [0074] – repeating steps for each split point), wherein the multiple splits are the same at each of the edge nodes (Liu, [0050] – teaches horizontal federated learning where the features are the same for each client; Liu, [0074] – teaches sending split point information from the control node to each of the clients; see also Liu, [0051]). Regarding claim 5, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches wherein the federated variance data includes a local cardinality for each of the feature splits, a local sum of the feature splits, and a local sum of squares of the feature splits (Liu, [0062] – teaches statistical information of the number of tags and the proportions for the tags [Proportions of the tags include sum and sum of squares as one is simply the square of the other]). Regarding claim 6, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches aggregating the federated variance data at the central node (Liu, [0065] – teaches determining a global variance based on the aggregated variance data received from the client devices; see also Liu, [0068]). Regarding claim 7, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches wherein the lowest global variance represents a best purity for the split (Liu, [0067]-[0072] – teaches that the lowest global variance teaches the least impurity [best purity] for a split). Regarding claim 8, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches constructing multiple decision trees that are the same at each of the edge nodes (Liu, [0051] – teaches generating multiple decision trees at each client to create a random forest at the client). Regarding claim 10, Liu teaches all of the limitations of the method of claim 1 as noted above. Liu further teaches sharing values for constructing each feature split for all features (Liu, [0051] – teaches each split point generated from the statistical data creates a node of a decision tree; Liu, [0074] – teaches sending split point information from the control node to each of the clients). Regarding claim 11, it is the storage medium embodiment of claim 1 with similar limitations to claim 1 and is rejected using the same reasoning found in claim 1. Liu further teaches a non-transitory storage medium having stored therein instructions that are executable by one or more hardware processors to perform operations comprising (Liu, [0112] – teaches a processor executing instructions stored in memory) … Regarding claim 12, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 2. Regarding claim 13, the rejection of claim 12 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 3. Regarding claim 14, the rejection of claim 12 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 4. Regarding claim 15, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 5. Regarding claim 16, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 6. Regarding claim 17, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 7. Regarding claim 18, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 8. Regarding claim 20, the rejection of claim 11 is incorporated herein. Further, the limitations in this claim are taught by Liu for the reasons set forth in the rejection of claim 10. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 9, 19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Liu in view of Pothula et al. (US 2021/0174257 A1 – Federated Machine-Learning Platform Leverag
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Prosecution Timeline

Show 1 earlier event
Dec 06, 2025
Non-Final Rejection — §101, §102, §103
Feb 26, 2026
Interview Requested
Mar 05, 2026
Examiner Interview Summary
Mar 05, 2026
Applicant Interview (Telephonic)
Mar 09, 2026
Response after Non-Final Action
Mar 09, 2026
Response Filed
Apr 03, 2026
Response Filed
Apr 24, 2026
Final Rejection — §101, §102, §103 (current)

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3y 9m (~7m remaining)
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