Prosecution Insights
Last updated: April 19, 2026
Application No. 18/283,308

SIMILARITY CALCULATION SYSTEM, SIMILARITY CALCULATION APPARATUS, SIMILARITY CALCULATION METHOD, AND SIMILARITY CALCULATION PROGRAM

Non-Final OA §101
Filed
Sep 21, 2023
Examiner
TRAN, VU V
Art Unit
2491
Tech Center
2400 — Computer Networks
Assignee
NEC Corporation
OA Round
1 (Non-Final)
90%
Grant Probability
Favorable
1-2
OA Rounds
2y 5m
To Grant
99%
With Interview

Examiner Intelligence

Grants 90% — above average
90%
Career Allow Rate
353 granted / 394 resolved
+31.6% vs TC avg
Strong +18% interview lift
Without
With
+17.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
15 currently pending
Career history
409
Total Applications
across all art units

Statute-Specific Performance

§101
10.0%
-30.0% vs TC avg
§103
46.8%
+6.8% vs TC avg
§102
16.8%
-23.2% vs TC avg
§112
16.1%
-23.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 394 resolved cases

Office Action

§101
DETAILED ACTION This Office Action is in response to application 17/283,308 filed on June 21, 2023. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. Claims 1-20 are pending and herein considered. Information Disclosure Statement The information disclosure statement (IDS) submitted on 09/21/2023. The submission is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. 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 1 is rejected under 35 USC § 101 as being directed to non-statutory subject matter. Regarding claim 1; claim 1 is rejected under 35 U.S.C. 101 because the claimed invention is directed to non-statutory subject matter. The claim(s) does/do not fall within at least one of the four categories of patent eligible subject matter because claim 5 recites “A system” In light of the specification, does not exclude the system to contain only non-transitory embodiment. Therefore, the claim is directed to a software per se. It is suggested that the claim be further amended to positively recite at least one hardware element within the body of the claim to make the claim statutory under 35 USC § 101. Regarding claims 2-20 are also rejected under 35 U.S.C 101 as being directed to non-statutory subject matter for the same reasons addressed above. 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. Claims 1-20 are rejected under 35 U.S.C. 101 as being directed to non-statutory subject matter. Regarding claims 1 are/is rejected under 35 USC 101 because the claims are/is directed to an abstract idea without being integrated into a practical application nor being significantly more. The claims reciting the limitations “calculating the similarity between a first vector and a second vector using homomorphic encryption having homomorphic operations defined with respect to at least one multiplication and a plurality of additions; transforming the value of a component of the second vector into a component in a unit vector that becomes 1 and encrypting the transformed result with the public key for the homomorphic encryption, wherein the similarity calculation apparatus obtains encrypted similarity between the first and the second vectors by calculating the inner product of the first and the second encrypted vectors using the homomorphic operations; are directed to an abstract idea as the claims recite mental processes. Accordingly, the claims recite an abstract idea. This judicial exception is not integrated into a practical application. It’s noted that the claims recite additional element(s) (i.e., encrypting the transformed result, calculating the inner product). However, said additional elements are recited at a high-level of generality (i.e., as a processing device performing a generic computer function of calculating/encrypting/performing) such that it amounts no more than mere instructions to apply to data using a generic computer component. Accordingly, this additional element does not integrate the abstract idea into a practical application because it does not impose any meaningful limits on practicing the abstract idea. Therefore, the claims are not integrated into a practical application. The claims do not include additional elements that are sufficient to amount to significantly more than the judicial exception because the additional elements when considered both individually and as an ordered combination do not amount to significantly more than the abstract idea. As mentioned above, although the claims recite additional elements, said elements taken individually or as a combination, do not result in the claim amounting to significantly more than the abstract idea because as the additional elements perform generic computer content distributing functions routinely used in information technology field. receiving, and storing in the memory, data for performing a homomorphic encryption operation, the data comprising or corresponding to a ciphertext having a first number of dimensions; in view of Berkheimer memo. Generic computer components recited as performing generic computer functions that are well understood, routine and conventional activities amount to no more than implementing the abstract idea with a computerized system. Therefore, the claim is directed to non-statutory subject matter. Regarding claims 2-20 are also rejected under 35 U.S.C 101 as being directed to non-statutory subject matter for the same reasons addressed above as the claims are directed to abstract idea without being integrated into a practical application nor being significantly more. Allowable Subject Matter Claim2-20 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 101 or 35 U.S.C. 101 (pre-AIA ), , set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. Related Art The following prior art made of record and cited on PTO-892, but not relied upon, is considered pertinent to applicant’s disclosure: U.S. Pub. Number 2017/0169241 A1 to Unagami-Unagami teaches a data search method of a first device storing multiple sets of privacy data acquired from multiple persons and multiple reference features corresponding to the multiple sets of privacy data, where the multiple reference features each are expressed by an n-dimensional vector, includes receiving first encrypted features from a second device connected to the first device, generating multiple second converted features by a second conversion of the multiple reference features, generating of multiple second encrypted features by encrypting the multiple second converted features using inner product encryption, acquiring multiple inner product values by performing inner product computation of each of the first encrypted features and the multiple second encrypted features, determining whether or not the first features and the first reference features are similar, and transmitting of first privacy data corresponding to the first reference features out of the multiple sets of privacy data to the second device. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to VU V TRAN whose telephone number is (571)270-1708. The examiner can normally be reached M-F, 8 AM- 4 PM. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor William Korzuch can be reached on 571-272-7589. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /VU V TRAN/Primary Examiner, Art Unit 2491
Read full office action

Prosecution Timeline

Sep 21, 2023
Application Filed
Feb 07, 2026
Non-Final Rejection — §101 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
90%
Grant Probability
99%
With Interview (+17.8%)
2y 5m
Median Time to Grant
Low
PTA Risk
Based on 394 resolved cases by this examiner. Grant probability derived from career allow rate.

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