Prosecution Insights
Last updated: April 19, 2026
Application No. 18/393,559

DETECTING A MALFUNCTION ASSOCIATED WITH AN IMPULSE LINE

Non-Final OA §101
Filed
Dec 21, 2023
Examiner
LAU, HOI CHING
Art Unit
2689
Tech Center
2600 — Communications
Assignee
Canadian Natural Resources Limited
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
2y 5m
To Grant
90%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
791 granted / 1065 resolved
+12.3% vs TC avg
Strong +16% interview lift
Without
With
+16.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
23 currently pending
Career history
1088
Total Applications
across all art units

Statute-Specific Performance

§101
3.8%
-36.2% vs TC avg
§103
51.6%
+11.6% vs TC avg
§102
12.1%
-27.9% vs TC avg
§112
21.7%
-18.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1065 resolved cases

Office Action

§101
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 . DETAILED ACTION Claims 16-29 and 59-66 have been examined and claims 1-15,30-58,67-84 have been withdrawn from consideration. Election/Restrictions Applicant's election with traverse of Species II (claims 16-29 and 59-66) in the reply filed on January 14, 2026 is acknowledged. The traversal is on the ground(s) that the Examiner has failed to establish that a search of the complete application would be an undue burden as required by MPEP 803. This is not found persuasive because the specie II is patentably distinct due to differences from Species I and III as stated in the previous office action: Species II corresponds to "obtaining a predicted measurement for the first impulse line at a first time, wherein the predicted measurement is based on a first measurement and a second measurement, the first measurement having been performed on contents of the first impulse line at a second time before the first time, the second measurement having been performed on contents of a second impulse line, the second impulse line being operatively connected to the system; comparing the predicted measurement to a third measurement performed using the first impulse line at the first time to detect whether a malfunction associated with the first impulse line has occurred" that is not disclosed in Species I and III. Functional claim elements, including “obtaining a predicted measurement”, “comparing the predicted measurement to a third measurement”, and “causing an alert”, are supported in the specification by a generic machine-learning model, processors, and measurement apparatus. No further structural specificity is disclosed beyond these elements. Based on the evident of record, the office maintains the election/restriction requirement. Examination of Species II will continue as elected. The requirement is still deemed proper and is therefore made FINAL. 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. The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 16-29 and 59-66 are rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. The claim(s) recite(s) methods and apparatuses for detecting a malfunction in a first impulse line based on predicting measurement using prior measurements from the first and second impulse lines, comparing the predicted measurements to actual measurements, and generating an alert when a deviation is detected. These limitations correspond to mental processes, i.e., the series of steps for obtaining data, predicting an outcome, performing a comparison, and determining a deviation, which can be performed by human using pen and paper or simple observation. Therefore, the claims fall within the “Mental Processes” grouping of abstract ideas. Accordingly, the claim recites an abstract idea. This judicial exception is not integrated into a practical application because the claims only recite generic computer components, including a processor, memory, and machine-learning model, performing the above-described mental processes. Nothing in the claims improves the functioning of the computer or imposes a meaningful limitation on how the abstract idea is performed. The recitation of these generic computing components merely implements the abstract idea on conventional hardware and does not integrate the abstract idea into a practical application. The claims do not include additional elements that are sufficient to amount to significantly more than the judicial exception. Specifically, the recited additional element such as: The generic processor (claims 59-66) Non-transitory computer-readable storage medium storing instructions (claims 59-66), and Machine-learning model developed using prior measurements (claims 16-29, 59-66) are well-understood, routine, and conventional components performing their ordinary functions. When considered alone or in combination, these elements merely provide generic instructions to apply the abstract idea using conventional computer components, and do not add an inventive concept. Therefore, the additional elements do not render the claims patent eligible. According, claims 16-29 and 59-66 are directed to an abstract idea and are not patent eligible. Dependent claims 17-29 and 60-66 recite further limitations that relate to the abstract idea, including additional data inputs, sliding time windows, thresholds, labels for machine learning, an specific properties of the first and second impulse lines (e.g. pressure, flow, level). These additional limitations do not integrate the abstract idea into a practical application and do not provide significantly more. Therefore, dependent claims 17-29 and 60-66 are also rejected under 35 U.S.C. 101. Allowable Subject Matter Claims 16-29 and 59-66 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 101, set forth in this Office action. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to HOI C LAU whose telephone number is (571)272-8547. The examiner can normally be reached on Monday-Friday, 8:30am-5:00Pm EST. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Davetta Goins can be reached on (571)272-2957. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /HOI C LAU/Primary Examiner, Art Unit 2689
Read full office action

Prosecution Timeline

Dec 21, 2023
Application Filed
Dec 22, 2025
Response after Non-Final Action
Feb 07, 2026
Non-Final Rejection — §101 (current)

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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
74%
Grant Probability
90%
With Interview (+16.2%)
2y 5m
Median Time to Grant
Low
PTA Risk
Based on 1065 resolved cases by this examiner. Grant probability derived from career allow rate.

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