Prosecution Insights
Last updated: October 02, 2026
Application No. 18/689,417

ONE-SHOT OVERMOLDING OF THE ROTOR FOR ELECTRIC MOTOR

Final Rejection §112
Filed
Mar 05, 2024
Priority
Sep 06, 2021 — EU 21195082.9 +2 more
Examiner
TRUONG, THOMAS
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Mahle International GmbH
OA Round
2 (Final)
73%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
89%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
950 granted / 1295 resolved
+5.4% vs TC avg
Strong +16% interview lift
Without
With
+15.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
32 currently pending
Career history
1316
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
53.2%
+13.2% vs TC avg
§102
18.5%
-21.5% vs TC avg
§112
24.0%
-16.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1295 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. Claim 23 is 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 23 recites the limitation "the stator core" in line 6. There is insufficient antecedent basis for this limitation in the claim. Allowable Subject Matter Claims 1-4 and 14-22 are allowed. RE claim 1, as amended, the prior-art does not teach a rotor for an electric motor, comprising: a shaft and a rotor core, the rotor core including an adjacent front surface, a plurality of cavities protruding along a rotor core body, a plurality of magnets, and a resin fixing the plurality of magnets within the rotor core; and a manifold of resin formed on the front surface of the rotor core, the manifold at least partially overlapping at least one cavity of the plurality of cavities; wherein the front surface of the rotor core includes a radially outer clamping region, a radially inner clamping region, and an intermediate region disposed between the outer clamping region and the inner clamping region; wherein the outer clamping region and the inner clamping region of the front surface of the rotor core are free of the manifold; and wherein the manifold is bonded and/or restrained to the intermediate region of the front surface of the rotor core via the resin. Claims 2-4 and 14-20 are allowable for their dependency on claim 1. RE claim 21, the prior-art does not teach a rotor for an electric motor, comprising: a shaft;a rotor core including an axial front surface, a plurality of axial cavities, a plurality of magnets, and an overmolded body composed of a resin, the overmolded body fixing the plurality of magnets within the rotor core; and a manifold arranged on the front surface of the rotor core and at least partially overlapping an open end of each cavity of the plurality of cavities, the manifold defined by a portion of the overmolded body; wherein the open end of each cavity of the plurality of cavities includes a respective overlapped region that is covered by the manifold, the respective overlapped region having a cross- sectional area that is at least three times greater than a largest size of a filler within the resin of the overmolded body. Claim 22 are allowable for their dependency on claim 1. Claim 23 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. RE claim 23, the prior-art does not teach a rotor for an electric motor, comprising: a shaft; a rotor core including a plurality of laminated sheets, a plurality of axially extending cavities, a plurality of magnets, and an overmolded body composed of a resin, the overmolded body fixing the plurality of magnets within the rotor core; and a manifold arranged at least partially on an axial end of the stator core, the manifold defined by a portion of the overmolded body; wherein the plurality of laminated sheets are arranged to define a plurality of stacks including a first stack and a second stack, the first stack and the second stack disposed coaxially along a central axis of the shaft and skewed around the central axis relative to one another; wherein the plurality of cavities includes a plurality of first cavities disposed in the first stack and a plurality of second cavities disposed in the second stack; wherein the manifold is arranged on a front surface of the first stack and at least partially covers at least one of the plurality of first cavities; and wherein at least one first cavity of the plurality of first cavities is at least partially axially aligned with at least one second cavity of the plurality of second cavities and an overlapping region between the at least one first cavity and the at least one second cavity has a cross-sectional area that is at least three times greater than a largest size of a filler within the resin of the overmolded body. 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 THOMAS TRUONG whose telephone number is (571)270-5532. The examiner can normally be reached Monday-Friday 9AM-6PM EST. 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, Seye Iwarere can be reached at (571) 270-5112. 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. /THOMAS TRUONG/Primary Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Mar 05, 2024
Application Filed
Mar 24, 2026
Non-Final Rejection mailed — §112
Jun 23, 2026
Response Filed
Sep 01, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12749935
AXIAL FLUX ELECTRIC MOTOR WITH ROTOR COOLING
2y 6m to grant Granted Sep 29, 2026
Patent 12744416
STATOR LAMINATION, STATOR STRUCTURE, MOTOR STRUCTURE, AND LAUNDRY TREATMENT APPARATUS
2y 6m to grant Granted Sep 22, 2026
Patent 12738825
TECHNIQUES FOR REDUCTION OF ELECTRIC MOTOR TORQUE PULSATION
2y 11m to grant Granted Sep 15, 2026
Patent 12738784
MOTOR
2y 9m to grant Granted Sep 15, 2026
Patent 12738808
BRUSHLESS MOTOR FOR A POWER TOOL
2y 0m to grant Granted Sep 15, 2026
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
73%
Grant Probability
89%
With Interview (+15.8%)
2y 7m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1295 resolved cases by this examiner. Grant probability derived from career allowance rate.

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