Prosecution Insights
Last updated: October 01, 2026
Application No. 18/424,999

JUNCTION TEMPERATURE ESTIMATION

Final Rejection §112
Filed
Jan 29, 2024
Priority
Feb 21, 2023 — GB 2302441.7
Examiner
JAGAN, MIRELLYS
Art Unit
2855
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Rolls-Royce plc
OA Round
2 (Final)
83%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
89%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
1239 granted / 1494 resolved
+14.9% vs TC avg
Moderate +6% lift
Without
With
+5.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
23 currently pending
Career history
1509
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
50.9%
+10.9% vs TC avg
§102
32.4%
-7.6% vs TC avg
§112
13.2%
-26.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1494 resolved cases

Office Action

§112
DETAILED ACTION 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 § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-20 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. In claim 1, it is not clear how the step of measuring a temperature of the transistors from the temperature sensor during a switching period of the transistors, as recited in lines 16-18, is used in the step of updating a stored calibration parameter, as recited in lines 19-22 (there is no relationship between these two steps with respect to measuring a temperature of the transistors). In claim 10, it is not clear how the temperature signal received by the junction temperature measurement module, as recited in lines 11-12, is used in the step of updating a stored calibration parameter, as recited in lines 17-19 (there is no relationship between the temperature signal with respect to updating a stored calibration parameter). Claims 2-9 and 11-20 are rejected for being dependent on a rejected base claim. Allowable Subject Matter Claims 1-20 would be allowable if rewritten or amended to overcome the rejections under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: The prior art of record does not disclose or suggest the following in combination with the remaining limitations of the claims: A method of calibrating an electrical power system, the method comprising the junction temperature measurement module measuring a threshold voltage of the transistor-transistors from the current signal and a temperature of the transistor transistors from the temperature sensor during a switching period of the transistor transistors; and the junction temperature measurement module updating a stored calibration parameter defining a relationship between a rate of change of the current and an estimated junction temperature of the transistor transistors based on a detection of a change in the measured threshold voltage of the transistors (claim 1). An electrical power system comprising a junction temperature measurement module configured, during a calibration of the electrical power system, to measure, from the current signal, a threshold voltage of the transistors during a switching period of the transistors; and update a stored calibration parameter defining a relationship between a rate of change of the current and an estimated junction temperature of the transistors based on a detection of a change in the measured threshold voltage of the transistors (claim 10). Response to Arguments Applicant’s arguments with respect to claims have been considered, but are not persuasive for the reasons stated in the rejections above. Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MIRELLYS JAGAN whose telephone number is (571)272-2247. The examiner can normally be reached Tuesday-Friday 8-6. 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, Kristina DeHerrera can be reached at 303-297-4237. 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. /MIRELLYS JAGAN/ Primary Examiner Art Unit 2855 8/26/26
Read full office action

Prosecution Timeline

Jan 29, 2024
Application Filed
May 01, 2026
Non-Final Rejection mailed — §112
Jul 28, 2026
Response Filed
Aug 28, 2026
Final Rejection mailed — §112 (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

3-4
Expected OA Rounds
83%
Grant Probability
89%
With Interview (+5.7%)
2y 7m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1494 resolved cases by this examiner. Grant probability derived from career allowance rate.

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