Prosecution Insights
Last updated: October 02, 2026
Application No. 18/839,316

LOW-IMPEDANCE CLAMPING CIRCUIT FOR A SEMICONDUCTOR SWITCHING ELEMENT IN A CONVERTER

Non-Final OA §102§103
Filed
Aug 16, 2024
Priority
Feb 17, 2022 — DE 10 2022 201 640.8 +1 more
Examiner
DINH, THAI T
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
ZF Friedrichshafen AG
OA Round
1 (Non-Final)
86%
Grant Probability
Favorable
1-2
OA Rounds
2m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
583 granted / 677 resolved
+18.1% vs TC avg
Minimal +0% lift
Without
With
+0.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
22 currently pending
Career history
693
Total Applications
across all art units

Statute-Specific Performance

§101
3.1%
-36.9% vs TC avg
§103
51.3%
+11.3% vs TC avg
§102
21.4%
-18.6% vs TC avg
§112
21.7%
-18.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 677 resolved cases

Office Action

§102 §103
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 § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1-5, 8-9, 13-14 and 17 are rejected under 35 U.S.C. 102(a)(1)/102(a)(2) as being anticipated by Miyazaki et al. (hereinafter Miyazaki, US 10,734,911 B2). For claim 1, Miyazaki discloses a clamping circuit for a power module (Fig. 3A of Miyazaki discloses a clamping circuit (QM1, QM4) for a power module 2 – see Miyazaki, Fig. 3A, col. 7, line 62 through col. 8, line 11), wherein the power module comprises one or more semiconductor switches connected in parallel (Figs. 3A and 17 of Miyazaki disclose the power module 2 comprises one or more semiconductor switches (Q1, Q4) connected in parallel – see Miyazaki, Figs. 3A and 17, col. 7, lines 51-61 and col. 19, lines 55-60) and a plurality of terminals for an input current and an output current (Figs. 3A and 17 of Miyazaki disclose a plurality of terminals (P(D1), N(S4), O(D4), O(S1), GT1, GT4, MGT1, MGT4) for an input current and an output current – see Miyazaki, Figs. 3A and 17, col. 7, line 62 through col. 8, line 5; col. 8, lines 41-52; and col. 19, line 61 through col. 20, line 5), and a plurality of signal pins (GT1, GT4, MGT1, MGT4) for transmitting control signals generated by a driver module to the power module (see Miyazaki, Fig. 3A, col. 8, lines 28-40), wherein the semiconductor switches (Q1, Q4), terminals, and signal pins in the power module form a module circuit (see Miyazaki, Figs. 3A and 5, col. 7, line 40 through col. 8, line 27), wherein the clamping circuit (QM1, QM4) comprises: a clamping switch between a gate terminal and a reference potential terminal on a semiconductor switch of the one or more semiconductor switches, wherein the clamping switch is integrated in the module circuit in the power module (Fig. 3A of Miyazaki discloses a clamping switch QM1, (QM4) between a gate terminal GT1 (GT4) and a reference potential terminal SST1 (SST4) on a semiconductor switch Q1 (Q4) of the one or more semiconductor switches (Q1, Q4), wherein the clamping switch QM1 (QM4) is integrated in the module circuit 2 in the power module 2 – see Miyazaki, Fig. 3A, col. 7, line 62 through col. 8, line 11). For claim 2, Miyazaki discloses the clamping circuit according to claim 1, wherein a first signal pin for the power module is dedicated to the clamping switch to transmit a clamping signal generated by a control unit spatially separated from the power module to the clamping switch (Figs. 5 and 23 of Miyazaki disclose a first signal pin MGT1 (MGT4) for the power module is dedicated to the clamping switch QM1 (QM4) to transmit a clamping signal generated by a control unit 3 spatially separated from the power module 4 to the clamping switch QM1 (QM4) – see Miyazaki, Figs. 5 and 23, col. 8, lines 41-52 and col. 25, lines 6-14). For claim 3, Miyazaki discloses the clamping circuit according to claim 2, wherein the first signal pin extends from a clamping switch terminal on the clamping switch to the control unit (Figs. 3A, 19 and 23 of Miyazaki disclose the first signal pin MG (MGT1, MGT4) which extends from a clamping switch terminal on the clamping switch (QM1, QM4) to the control unit 3 via resistors MR1, MR4 – see Miyazaki, Figs. 3A, 19 and 23). For claims 4, and 13, Miyazaki discloses the clamping circuit according to claim 3 or claim 2, wherein the control unit is integrated in the driver module, and wherein the driver module is spaced apart from the power module (Figs. 3A, 19, 24 and 35 of Miyazaki disclose the control unit 3/180 which is integrated in the driver module 3/180, and wherein the driver module 3 is spaced apart from the power module 4/200 – see Miyazaki, Figs. 3A, 19, 24 and 35, col. 23, lines 15-43 and col. 30, lines 52-59). For claims 5 and 14, Miyazaki discloses the clamping circuit according to claim 2 or claim 13, comprising: a capacitor between the clamping switch and the gate terminal or the reference potential terminal on the semiconductor switch (Figs. 6-7 of Miyazaki disclose a capacitor CG1/CG4 between the clamping switch QM1/QM4 and the gate terminal SS1/SS4 or the reference potential terminal on the semiconductor switch Q1/Q4 – see Miyazaki, Figs. 6-7, col. 13, lines 44-64). For claim 8, Miyazaki discloses a power module for a converter (Fig. 35 of Miyazaki discloses a power module 200 for a converter 42A – see Miyazaki, Fig. 35, col. 30, lines 52-59), comprising: one or more semiconductor switches connected in parallel (Figs. 17 and 35 of Miyazaki disclose one or more semiconductor switches Q1-Q6 connected in parallel – see Miyazaki, Figs. 17 and 35; col. 19, lines 55-60 and col. 30, lines 63-67;); a plurality of terminals on the power module for an input current and an output current (Figs. 3A and 17 of Miyazaki disclose a plurality of terminals (P(D1), N(S4), O(D4), O(S1), GT1, GT4, MGT1, MGT4) for an input current and an output current – see Miyazaki, Figs. 3A and 17, col. 7, line 62 through col. 8, line 5 and col. 19, line 61 through col. 20, line 5); and a plurality of signal pins (GT1, GT4, MGT1, MGT4) for transmitting control signals generated by a driver module in the converter to the one or more semiconductor switches (see Miyazaki, Figs. 3A and 35, col. 8, lines 28-40), wherein the one or more semiconductor switches (Q1-Q6), terminals, and signal pins in the power module form a module circuit (see Miyazaki, Figs. 3A, 5 and 35, col. 7, line 40 through col. 8, line 27), which also comprises the clamping circuit switch according to claim 1 (see explanation in claim 1 above). For claim 9, Miyazaki discloses the clamping circuit according to claim 1, wherein the power module is insulated with insulation (see Miyazaki, Figs. 30-31, col. 27, lines 47-51 and col. 28, lines 15-57), wherein the signal pins for the power module extend out of a surface of the insulation see Miyazaki, Fig. 31, col. 28, line 15 through col. 29, line 5), and wherein the clamping circuit is inside the insulation (see Miyazaki, Fig. 32, col. 29, lines 13-51). For claim 17, Miyazaki discloses the clamping circuit according to claim 3, comprising: a capacitor between the clamping switch and the gate terminal or the reference potential terminal on the semiconductor switch (Figs. 6-7 of Miyazaki disclose a capacitor CG1/CG4 between the clamping switch QM1/QM4 and the gate terminal SS1/SS4 or the reference potential terminal on the semiconductor switch Q1/Q4 – see Miyazaki, Figs. 6-7, col. 13, lines 44-64). Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. Claims 10-12 are rejected under 35 U.S.C. 103 as being unpatentable over Miyazaki et al. (hereinafter Miyazaki, US 10,734,911 B2) in view of Alam et al. (hereinafter Alam, US 10,505,538 B1). For claim 10, Miyazaki discloses a converter for powering an electric drive in an electric vehicle or hybrid vehicle (Miyazaki discloses a converter for powering an electric drive (see Miyazaki, Fig. 35, col. 30, lines 52-59) which is silent for disclosing in an electric vehicle or hybrid vehicle. However, given that the reference shows the precise structure claimed by the present invention adds nothing to the claimed structure of the circuit, the phenomena, whether it is used in “an electric vehicle” or “hybrid vehicle” is an intended use of the circuit and that does not carry patentable weight. Since the teaching of Miyazaki for a converter for powering an electric drive which can be used in “an electric vehicle” or “hybrid vehicle”. For supporting Alam discloses a converter for powering an electric drive in an electric vehicle or hybrid vehicle (See Alam, Fig. 1, col. 4, line 59 through col. 5, line 26). Therefore, it would have been obvious to one having skill in the art at the time of the invention was made to use Miyazaki’s converter for powering an electric drive in an electric vehicle or hybrid vehicle as taught by Alam for purpose of controlling power of electric/hybrid vehicle efficiently), wherein the converter comprises: a plurality of phase units and a driver module spatially separated from the plurality of phase units (Figs. 3 and 35 of Miyazaki disclose a plurality of phase units U, V, W and a driver module 2 spatially separated from the plurality of phase units U, V, W), wherein each of the plurality of phase units is assigned a current phase (see Miyazaki, Figs. 3A, 13-14, 28 and 35; col. 7, line 62 through col. 8, line 5; col. 8, lines 41-52; col. 26, lines 53-61), and wherein the plurality of phase units each have one or more of the power modules according to claim 1 (same as explanation in claim 1 above). For claim 11, Miyazaki in view of Alam disclose an electric axle drive for an electric vehicle or hybrid vehicle (Fig. 1 of Alam discloses an electric axle drive 18 for an electric vehicle or hybrid vehicle 10 – see Alam, Fig. 1, col. 4, line 59 through col. 5, line 26) comprising: an electric motor (Fig. 35 of Miyazaki discloses an electric motor 51; and Fig. 1 of Alam discloses an electric motor 26); a transmission (Fig. 1 of Alam discloses a transmission 14 – see Alam, Fig. 1, col. 5, lines 19-23); and the converter according to claim 10 (same as explanation in claim 10 above). For claim 12, Miyazaki in view of Alam disclose an electric vehicle or hybrid vehicle, comprising: the electric axle drive according to claim 11 (same as explanation in claim 11 above). Allowable Subject Matter Claims 6-7, 15-16 and 18-19 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to THAI T DINH whose telephone number is (571)270-3852. The examiner can normally be reached (571)270-3852. 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. /THAI T DINH/Primary Examiner, Art Unit 2837 July 23, 2026
Read full office action

Prosecution Timeline

Aug 16, 2024
Application Filed
Jul 28, 2026
Non-Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12745369
SYSTEMS AND METHODS FOR ACTIVE DISCHARGE FOR INVERTER FOR ELECTRIC VEHICLE
3y 4m to grant Granted Sep 22, 2026
Patent 12726147
MOTOR DRIVER
2y 0m to grant Granted Sep 01, 2026
Patent 12715599
Flight System And Method For Responding Failure Thereof
2y 9m to grant Granted Aug 25, 2026
Patent 12700817
METHOD AND SYSTEM FOR CONTROLLING AN ELECTRIC MACHINE
2y 3m to grant Granted Aug 04, 2026
Patent 12695401
POWER TOOL AND CONTROL METHOD THEREFOR
2y 7m to grant Granted Jul 28, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
86%
Grant Probability
86%
With Interview (+0.2%)
2y 4m (~2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 677 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month