Prosecution Insights
Last updated: August 17, 2026
Application No. 19/020,883

SYSTEM AND METHODS FOR BATTERY ISOLATION FAULT DIAGNOSIS

Non-Final OA §112
Filed
Jan 14, 2025
Examiner
NGUYEN, VINH P
Art Unit
2858
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Proterra Powered LLC
OA Round
1 (Non-Final)
86%
Grant Probability
Favorable
1-2
OA Rounds
8m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
1187 granted / 1374 resolved
+18.4% vs TC avg
Strong +16% interview lift
Without
With
+16.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
21 currently pending
Career history
1392
Total Applications
across all art units

Statute-Specific Performance

§101
3.3%
-36.7% vs TC avg
§103
32.6%
-7.4% vs TC avg
§102
11.8%
-28.2% vs TC avg
§112
43.0%
+3.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1374 resolved cases

Office Action

§112
DETAILED ACTION 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 § 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 unclear how “an isolation breakdown” is interrelated and associated with “an electrical location of a fault in the plurality of HV battery packs”? Furthermore, it is unclear where “a battery pack positive voltage” and “a battery pack positive voltage” are from, Are they from the battery cells” It appears that the scope of the claim is incomplete. In claim 2, it is unclear how “a physical location of the fault” is interrelated and associated with “an electrical location of fault” as recited in claim 1? In claim 10, it is unclear how “battery pack positive voltage and a battery pack negative voltage” are interrelated and associated with “a low resistance connection exists between a portion of a series connection of a plurality of battery cells of the plurality of HV battery packs and a chassis ground of the electric vehicle? Furthermore, it is unclear how “an isolation breakdown” is interrelated and associated with “an electrical location of a fault”? Furthermore, it is unclear where “a battery pack positive voltage” and “a battery pack positive voltage” are from, Are they from the battery cells” It appears that the scope of the claim is incomplete. In claims 11-12, it is unclear how “a physical location of the fault” is interrelated and associated with “an electrical location of fault” as recited in claim 10? In claim 14, it is unclear how “ an exact physical location of the isolation breakdown” is interrelated and associated with “an electrical location of a fault in the plurality of HV battery packs” as recited in claim 10? In claim 17, it is unclear how “battery pack positive voltage and a battery pack negative voltage” are interrelated and associated with “a low resistance connection exists between a portion of a series connection of a plurality of battery cells of the plurality of HV battery packs and a chassis ground of the electric vehicle? Furthermore, it is unclear how “an isolation breakdown” is interrelated and associated with “an electrical location of a fault”? Furthermore, it is unclear where “a battery pack positive voltage” and “a battery pack positive voltage” are from, Are they from the battery cells” It appears that the scope of the claim is incomplete. In claims 18-19, it is unclear how “a physical location of the fault” is interrelated and associated with “an electrical location of fault” as recited in claim 10? The dependent claims not specifically addressed share the same indefiniteness as they depend from rejected base claims. Conclusion Searches were performed and there is no prior art to meet the limitations of the instant claims 1-20. However, these claims are not allowed due to their deficiencies as mentioned in the current office action. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Hermann (Pat# 8,178,227) discloses Method For Detecting Battery Thermal Events Via Battery Pack Isolation Resistance Monitoring. Chen et al (Pat# 12,181,505) disclose Systems And Methods For Isolation Resistance Monitoring In A Battery Bank. Patel et al (Pat# 10,391,864) disclose System To Balance High Voltage Battery For Vehicle. Bober (pat# 9,063,179) discloses System And Method For Determining An Isolation Resistance Of A Battery Pack Disposed On A Vehicle Chassis. Sufrin-Disler et al (Pat# 9,007,066) disclose Measuring Isolated High Voltage And Detecting Isolation Breakdown With Measures For Self-detection Of Circuit Faults Any inquiry concerning this communication or earlier communications from the examiner should be directed to VINH P NGUYEN whose telephone number is (571)272-1964. The examiner can normally be reached M-F 6:00am-4:00pm. 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, Phan Huy can be reached on 571-272-7924. 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. /VINH P NGUYEN/Primary Examiner, Art Unit 2858
Read full office action

Prosecution Timeline

Jan 14, 2025
Application Filed
Jul 28, 2026
Non-Final Rejection mailed — §112 (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
86%
Grant Probability
99%
With Interview (+16.1%)
2y 3m (~8m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1374 resolved cases by this examiner. Grant probability derived from career allowance rate.

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