Prosecution Insights
Last updated: April 19, 2026
Application No. 18/364,088

TRAPEZOIDAL CURRENT CONTROL IN ELECTRONIC TRANSFORMERS

Final Rejection §112
Filed
Aug 02, 2023
Examiner
LAXTON, GARY L
Art Unit
2838
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
OA Round
3 (Final)
86%
Grant Probability
Favorable
4-5
OA Rounds
2y 4m
To Grant
93%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allow Rate
943 granted / 1090 resolved
+18.5% vs TC avg
Moderate +7% lift
Without
With
+6.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
26 currently pending
Career history
1116
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
34.8%
-5.2% vs TC avg
§102
40.3%
+0.3% vs TC avg
§112
16.1%
-23.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1090 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 Objections The claims are objected to because they include reference characters which are not enclosed within parentheses. Reference characters corresponding to elements recited in the detailed description of the drawings and used in conjunction with the recitation of the same element or group of elements in the claims should be enclosed within parentheses so as to avoid confusion with other numbers or characters which may appear in the claims. See MPEP § 608.01(m). Reference characters should not be used as claim limitations. 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, 3-10 and 12-16 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. Claim 1 recites the limitation "a full bridge" in line 15. There is insufficient antecedent basis for this limitation in the claim. Line 8 recited a full bridge as well, it is unclear how many full bridges the applicant is attempting to claim. Claim 1 recites the limitation "a full bridge of switch devices" in line 15. There is insufficient antecedent basis for this limitation in the claim. It is unclear which switching devices the applicant is referring to. Claims 3-9 inherit the same from claim 1. Claim 10 recites the limitation "a full bridge" in line 15. There is insufficient antecedent basis for this limitation in the claim. Line 8 recited a full bridge as well, it is unclear how many full bridges the applicant is attempting to claim. Claim 10 recites the limitation "a full bridge of switch devices" in line 15. There is insufficient antecedent basis for this limitation in the claim. It is unclear which switching devices the applicant is referring to. Claims 12-16 inherit the same from claim 10. Allowable Subject Matter Claims 1, 3-10 and 12-16 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. Claims 17-20 would be allowable if rewritten or amended to overcome the objection(s) set forth in this Office action. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 GARY L LAXTON whose telephone number is (571)272-2079. The examiner can normally be reached Monday-Friday, 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, Crystal Hammond can be reached at 571-270-1682. 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. /GARY L LAXTON/Primary Examiner, Art Unit 2838 3/23/2026
Read full office action

Prosecution Timeline

Aug 02, 2023
Application Filed
May 09, 2025
Non-Final Rejection — §112
Aug 08, 2025
Response Filed
Oct 21, 2025
Non-Final Rejection — §112
Jan 07, 2026
Response Filed
Mar 23, 2026
Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12603581
POWER CONVERSION CIRCUIT, AND METHOD FOR PRODUCING POWER CONVERTER
2y 5m to grant Granted Apr 14, 2026
Patent 12592634
DIRECT CURRENT CONVERTER, CONTROL METHOD, DIRECT CURRENT COMBINER BOX, AND PHOTOVOLTAIC POWER GENERATION SYSTEM
2y 5m to grant Granted Mar 31, 2026
Patent 12592647
MULTIPLE-PORT BIDIRECTIONAL DC-DC CONVERTERS AND CONTROL METHODS THEROF
2y 5m to grant Granted Mar 31, 2026
Patent 12587099
COIL SHORT CIRCUIT PROTECTION IN DC-DC CONVERTERS
2y 5m to grant Granted Mar 24, 2026
Patent 12580472
APPARATUS AND METHOD FOR CONTROLLING BIDIRECTIONAL RESONANT DC-DC CONVERTERS
2y 5m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

4-5
Expected OA Rounds
86%
Grant Probability
93%
With Interview (+6.6%)
2y 4m
Median Time to Grant
High
PTA Risk
Based on 1090 resolved cases by this examiner. Grant probability derived from career allow rate.

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