Prosecution Insights
Last updated: April 19, 2026
Application No. 18/305,725

ROTOR CURRENT PREDICTION IN AN ELECTRIC MOTOR DRIVE HAVING AN ONLY-STATIONARY-SIDE COMPENSATION NETWORK

Non-Final OA §101§103
Filed
Apr 24, 2023
Examiner
MASIH, KAREN
Art Unit
2846
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
BORGWARNER, INC.
OA Round
1 (Non-Final)
91%
Grant Probability
Favorable
1-2
OA Rounds
2y 1m
To Grant
98%
With Interview

Examiner Intelligence

Grants 91% — above average
91%
Career Allow Rate
904 granted / 996 resolved
+22.8% vs TC avg
Moderate +7% lift
Without
With
+6.7%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
25 currently pending
Career history
1021
Total Applications
across all art units

Statute-Specific Performance

§101
4.9%
-35.1% vs TC avg
§103
54.1%
+14.1% vs TC avg
§102
11.2%
-28.8% vs TC avg
§112
16.9%
-23.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 996 resolved cases

Office Action

§101 §103
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 § 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 11-20 are rejected under 35 U.S.C. 101 because the claimed invention is directed to an abstract idea without significantly more. The claims recite routine data gathering such as predicting rotor current . There is nothing else being done to the motor . The judicial exception is not integrated into a practical application. The motor system is generic. Additional elements such as capacitive elements , and inductive element are generic and do not add significantly more than abstract idea. Additional element does not integrate abstract idea into practical application because it does not impose any meaningful limits on practicing the abstract idea . Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 1,4,7-14,17-20 are rejected under 35 U.S.C. 103 as being unpatentable over WO2019053675 in view of 20110038190 both cited by Applicant . WO2019053675 discloses motor system comprising a stationary side , a rotating side and stationary side comprising an excitation unit (122) including a resonant oscillator circuit including a tunable capacitor to tune a resonant frequency ( see pages 6-8,14 fig 2-3). WO2019053675 lacks disclosing , stationary side sensor system operable to detect current on stationary side and send current based sensor reading to controller, the controller operable to perform a rotor current predicting operation comprising predicting a rotor current associated with rotor of rotating side based at les in part on current based sensor reading and parameter of at least one component of compensation network of stationary side. 20110038190 discloses a measuring circuit (25) which measures voltage and /or currents at matching transformer (24) and/or primary side of rotating transformer (27) and function generator (26) which generates an estimate of current and /or voltage at load (122) in a secondary side of rotating transformer (27) ( see paragraph 26, fig 2 ) . It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention of to combine the motor system of WO2019053675 with controller of 20110038190 for improved control. Claim 11 discloses same as Claim 1 . Claims 2-3,12-13 disclose ac generator (23) producing an ac voltage from an intermediate dc voltage and the measuring circuit (25) in a stationary side of rotating transformer (27) , see paragraph 26, fig 2 of 20110038190. Claims 4,14 show oscillator circuit including tunable capacitor to tune the resonant frequency ( see page 14 , fig 2-3 of WO2019053675. Claims 7,17 are shown that stationary side comprises excitation unit (122) including a resonant oscillator circuit ( see page 14-15, fig 3 of WO2019053675 ). Claims 8,18 are shown considering that resonant oscillator circuit includes tunable capacitor , primary side of transformer, and push pull transistors and rotating side consist of rectifier (310) a load and secondary side of transformer ( see page 14-15 fig 3 in WO2019053675) . Claims 9,19 show oscillator circuit including tunable capacitor to tune resonant frequency ( see page 14 fig 2-3,in WO2019053675). Claims 10 and 20 are shown the stator coil arrangement (214A,214B) rotor coil arraignments (216A,216B) and stator coil arraignments (214A, 214B) that are operable to wirelessly transfer ac excitation signals to rotor coil arrangements (216A,216B) see pages 141-15 fig 2-3 in WO2109053675. Claim(s) 5-6,15-16 is/are rejected under 35 U.S.C. 103 as being unpatentable over WO2019053675 and 20110038190 as applied to claims 1-4,7-14,17-20 above, and further in view of 20170018974 . WO2019053675 and 20110038190 as disclosed above lack inductor and tuning capacitor . 20170018974 discloses inductor (Li) and tuning capacitor (C1) , see paragraph 52-53 , 82 and fig 2. It would have been obvious to one of ordinary skill in the art before the effective filing date of claimed invention to combine motor and controller of WO2019053675 and 20110038190 with inductor and capacitor of 20170018974 for improved control. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. 20110038190 discloses estimate current , 9509225 discloses LLC resonant filter transformer motor inverter and 2022/0306133 discloses estimation of torque . Any inquiry concerning this communication or earlier communications from the examiner should be directed to KAREN MASIH whose telephone number is (571)272-2068. The examiner can normally be reached m-f 8-5 with second Friday off. 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, Eduardo Colon Santana can be reached at 571-272-2060. 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. /KAREN MASIH/Primary Examiner, Art Unit 2846
Read full office action

Prosecution Timeline

Apr 24, 2023
Application Filed
Dec 11, 2024
Response after Non-Final Action
Mar 02, 2026
Non-Final Rejection — §101, §103 (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
91%
Grant Probability
98%
With Interview (+6.7%)
2y 1m
Median Time to Grant
Low
PTA Risk
Based on 996 resolved cases by this examiner. Grant probability derived from career allow rate.

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