Prosecution Insights
Last updated: April 19, 2026
Application No. 18/404,092

BALANCED STATOR WINDINGS

Final Rejection §102§103
Filed
Jan 04, 2024
Examiner
CHANG, MINKI
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Rivian Ip Holdings LLC
OA Round
2 (Final)
72%
Grant Probability
Favorable
3-4
OA Rounds
2y 9m
To Grant
82%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allow Rate
278 granted / 389 resolved
+3.5% vs TC avg
Moderate +10% lift
Without
With
+10.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
36 currently pending
Career history
425
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
50.7%
+10.7% vs TC avg
§102
27.5%
-12.5% vs TC avg
§112
17.7%
-22.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 389 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 . Response to Arguments Applicant’s arguments, see page 5, filed 11/11/2025, with respect to the 112(a) rejection of claims 3-8 and 15-19 and the drawing objection have been fully considered and are persuasive. The rejection of the claims and objection of the drawing has been withdrawn. Applicant's arguments filed 11/11/2025 have been fully considered but they are not persuasive. Applicant states that the prior art Rahman is not prior art due to the exception of 35 U.S.C. § 102(b)(1)(A), but no declaration of attribution under rule 130(a) has been filed to invoke the exception. The prior art Rahman names another inventor not named in the instant application. Thus, the rejection of claims 1-2, 4-5, 9-14, 16 and 20 are sustained. 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. Claims 1-2, 9-14 and 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Rahman et al. (US 2023/0018571 A1). Regarding claim 1, Rahman discloses a motor (¶ [0031]), comprising: a stator (100), including: a first slot (603, 703) associated with a first phase (phase B), the first slot (603, 703) configured to receive an even number of conductors (six, eight or ten conductors) associated with the first phase (phase B; FIG. 6-7); and a second slot (602, 702) associated with the first phase (phase B) and a second phase (phase A), the second slot (602, 702) configured to receive a subset of the even number of conductors (four to six conductors) associated with the first phase (phase B) and a first number of conductors (two to four conductors) associated with the second phase (phase A; FIG. 6-7). Regarding claim 2/1, Rahman was discussed above in claim 1. Rahman further discloses the subset of the even number of conductors associated with the first phase (phase B) located in a first position (layers 1-4) of the second slot (602); the first number of conductors associated with the second phase (phase A) located in a second position (layers 5-6) of the second slot (602); and the second position (layers 5-6) of the second slot (602) distal to a center portion of the stator (100) relative to the first position (layer 1-4) of the second slot (602). Regarding claim 9/1, Rahman was discussed above in claim 1. Rahman further discloses the stator (100) including a first face and a second face (see annotation below); the first slot (603, 703) including a cavity configured to receive at least a portion of the even number of conductors (FIG. 1) associated with the first phase (phase B); and the even number of conductors associated with the first phase (phase B) configured to extend along the cavity of the first slot (603, 703) to position a first portion (see annotation below) of the even number of conductors associated with the first phase external to the first face of the stator (100) and a second portion (see annotation below) of the even number of conductors associated with the first phase (phase B) external to the second face of the stator (100). PNG media_image1.png 468 326 media_image1.png Greyscale Regarding claim 10/1, Rahman was discussed above in claim 1. Rahman further discloses wherein the motor includes three phases (phases A, B, C), wherein the three phases include the first phase (phase B), the second phase (phase A), and a third phase (phase C), and further comprising: the stator (100), including: a pattern (FIG. 6-7) to define a placement of a first plurality of conductors (dotted pattern) associated with the first phase (phase B) relative to a placement of at least one of a second plurality of conductors (filled pattern) associated with the second phase (phase A) or a third plurality of conductors (slash pattern) associated with the third phase (phase C); the first plurality of conductors associated with the first phase (phase B) include the even number of conductors (FIG. 6-7) associated with the first phase (phase B); and the second plurality of conductors associated with the second phase (phase A) include the first number of conductors (FIG. 6-7) associated with the second phase (phase B). Regarding claim 11/1, Rahman was discussed above in claim 1. Rahman further discloses wherein the motor includes three phases (phase A, B, C), wherein the three phases include the first phase (phase B), the second phase (phase A), and a third phase (phase C), and further comprising: the stator (100), including: a first plurality of conductors (dotted pattern) associated with the first phase (phase B), the first plurality of conductors including the even number of conductors (FIG. 6-7) associated with the first phase (phase B); the first plurality of conductors associated with the first phase (phase B) disposed within a plurality of slots of the stator, the plurality of slots including the first slot (603, 703) and the second slot (602, 702); the first plurality of conductors associated with the first phase (phase B) disposed within the plurality of slots based on a predetermined pattern (FIG. 6-7); and the predetermined pattern to define one or more first slots (603, 703) of the plurality of slots associated with the first phase (phase B), one or more second slots (602, 702) of the plurality of slots associated with the first phase (phase B) and the second phase (phase A), one or more third slots (604, 704) of the plurality of slots associated with the first phase (phase B) and the third phase (phase C), one or more fourth slots (601, 701) of the plurality of slots associated with the second phase (phase A), and one or more fifth slots (605, 705) of the plurality of slots associated with the third phase (phase C). Regarding claim 12/1, Rahman was discussed above in claim 1. Rahman further discloses wherein a number of conductors included in the even number of conductors is based on a stator winding pattern (FIG. 6-7). Regarding claim 13, Rahman discloses a vehicle (¶ [0026]), comprising: a motor (¶ [0031]), including: a stator (100), including: a first slot (603, 703) associated with a first phase (phase B), the first slot (603, 703) configured to receive an even number of conductors (six conductors) associated with the first phase (phase B; FIG. 6-7); and a second slot (602, 702) associated with the first phase (phase B) and a second phase (phase A), the second slot (602, 702) configured to receive a subset of the even number of conductors (four conductors) associated with the first phase (phase B) and a first number of conductors (two conductors) associated with the second phase (phase A; FIG. 6-7). Regarding claim 14/13, Rahman was discussed above in claim 13. Rahman further discloses the subset of the even number of conductors associated with the first phase (phase B) located in a first position (layers 1-4) of the second slot (602); the first number of conductors associated with the second phase (phase A) located in a second position (layers 5-6) of the second slot (602); and the second position (layers 5-6) of the second slot (602) distal to a center portion of the stator (100) relative to the first position (layer 1-4) of the second slot (602). Regarding claim 20, Rahman discloses a method, comprising: disposing, in a first slot (603, 703) of a stator (100), an even number of conductors associated with a first phase (phase B), the first slot (603, 703) associated with the first phase (phase B); and disposing, in a second slot (602, 702) of the stator (100), a subset of the even number of conductors (six conductors) associated with the first phase (phase B) and a first number of conductors (two conductors) associated with a second phase (phase A), the second slot (602, 702) associated with the first phase (phase B) and the second phase (phase A). Claims 1-2, 9-12 and 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Shibata et al. (US 2015/0022046 A1). Regarding claim 1, Shibata discloses a motor (¶ [0023]), comprising: a stator (11), including: a first slot (slot 5) associated with a first phase (u phase), the first slot (slot 5) configured to receive an even number of conductors (31; eight layers) associated with the first phase (u phase); and a second slot (slot 4) associated with the first phase (u phase) and a second phase (v phase), the second slot (slot 4) configured to receive a subset of the even number of conductors (31; four layers) associated with the first phase (u phase) and a first number of conductors (31; four layers) associated with the second phase (v phase; FIG. 3). Regarding claim 2/1, Shibata was discussed above in claim 1. Shibata further discloses the subset of the even number of conductors (31; four layers) associated with the first phase (u phase) located in a first position (layers 1-4) of the second slot (slot 4); the first number of conductors (31; four layers) associated with the second phase (v phase) located in a second position (layers 5-8) of the second slot (slot 4); and the second position (layers 5-8) of the second slot distal to a center portion (outer radial side) of the stator (11) relative to the first position (layers 1-4) of the second slot (FIG. 3). Regarding claim 9/1, Shibata was discussed above in claim 1. Shibata further discloses the stator including a first face (first end side; FIG. 5B) and a second face (second end side; FIG. 5B); the first slot (slot 5) including a cavity (FIG. 1 and 5B) configured to receive at least a portion of the even number of conductors (31; eight layers) associated with the first phase (u phase); and the even number of conductors (31; eight layers) associated with the first phase (u phase) configured to extend along the cavity of the first slot (slot 5) to position a first portion (43) of the even number of conductors (31; eight layers) associated with the first phase (u phase) external to the first face (first end side) of the stator (11) and a second portion (43) of the even number of conductors (31; eight layers) associated with the first phase (u phase) external to the second face (second end side) of the stator (11). Regarding claim 10/1, Shibata was discussed above in claim 1. Shibata further discloses wherein the motor includes three phases (¶ [0025]), wherein the three phases include the first phase (u phase), the second phase (v phase), and a third phase (w phase), and further comprising: the stator (11), including: a pattern to define a placement of a first plurality of conductors (31 in slot 5) associated with the first phase (u phase) relative to a placement of at least one of a second plurality of conductors (31 in slot 4) associated with the second phase (v phase) or a third plurality of conductors (31 in slot 6) associated with the third phase (w phase); the first plurality of conductors (31 in slot 5) associated with the first phase (u phase) include the even number of conductors (31; eight layers) associated with the first phase (u phase); and the second plurality of conductors (31 in slot 4) associated with the second phase (v phase) include the first number of conductors (31; four layers) associated with the second phase (v phase). Regarding claim 11/1, Shibata was discussed above in claim 1. Shibata further discloses wherein the motor includes three phases (¶ [0025]), wherein the three phases include the first phase (u phase), the second phase (v phase), and a third phase (w phase), and further comprising: the stator (11), including: a first plurality of conductors (31 in slot 5) associated with the first phase (u phase), the first plurality of conductors (31 in slot 5) including the even number of conductors (31; eight layers) associated with the first phase (u phase); the first plurality of conductors (31 in slot 5) associated with the first phase (u phase) disposed within a plurality of slots (12) of the stator (11), the plurality of slots (12) including the first slot (slot 5) and the second slot (slot 4); the first plurality of conductors (31 in slot 5) associated with the first phase (u phase) disposed within the plurality of slots (12) based on a predetermined pattern (pitch of 6 slots); and the predetermined pattern (pitch of 6 slots) to define one or more first slots (slot 5, slot 11, slot 17…) of the plurality of slots (12) associated with the first phase (u phase), one or more second slots (slot 4, slot 10, slot 16…) of the plurality of slots (12) associated with the first phase (u phase) and the second phase (v phase), one or more third slots (slot 6, slot 12, slot 18…) of the plurality of slots (12) associated with the first phase (u phase) and the third phase (w phase), one or more fourth slots (slot 3, slot 9, slot 15…) of the plurality of slots (12) associated with the second phase (v phase), and one or more fifth slots (slot 7, slot 13, slot 19…) of the plurality of slots (12) associated with the third phase (w phase). Regarding claim 12/1, Shibata was discussed above in claim 1. Shibata further disclose wherein a number of conductors (31) included in the even number of conductors (31; eight layers) is based on a stator winding pattern (FIG. 3-4). Regarding claim 20, Shibata discloses a method, comprising: Disposing, in a first slot (slot 5) of a stator (11), an even number of conductors (31; eight layers) associated with a first phase (u phase), the first slot (slot 5) associated with the first phase (u phase); and Disposing, in a second slot (slot 4) of the stator (11), a subset of the even number of conductors (31; four layers) associated with the first phase (u phase) and a first number of conductors (31; four layers) associated with a second phase (v phase), the second slot (slot 4) associated with the first phase (u phase) and the second phase (v phase; FIG. 3). 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. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 13-14 are rejected under 35 U.S.C. 103 as being unpatentable over Shibata et al. (US 2015/0022046 A1) in view of Tang et al. (US 2021/0218305 A1). Regarding claim 13, Shibata discloses a motor (¶ [0023]), including: a stator (11), including: a first slot (slot 5) associated with a first phase (u phase), the first slot (slot 5) configured to receive an even number of conductors (31; eight layers) associated with the first phase (u phase); and a second slot (slot 4) associated with the first phase (u phase) and a second phase (v phase), the second slot (slot 4) configured to receive a subset of the even number of conductors (31; four layers) associated with the first phase (u phase) and a first number of conductors (31; four layers) associated with the second phase (v phase; FIG. 4). Shibata does not disclose a vehicle, comprising: the motor. Tang discloses a vehicle (¶ [0015]), comprising: the motor (20). It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Shibata in view of Tang to disclose a vehicle, comprising: the motor, as electric machines are commonly used in vehicles as a generator for battery charging or a motor for propulsion. Regarding claim 14/13, Shibata in view of Tang was discussed above in claim 13. Shibata further discloses the subset of the even number of conductors (31; four layers) associated with the first phase (u phase) located in a first position (layers 1-4) of the second slot (slot 4); the first number of conductors (31; four layers) associated with the second phase (v phase) located in a second position (layers 5-8) of the second slot (slot 4); and the second position (layers 5-8) of the second slot distal to a center portion (outer radial side) of the stator (11) relative to the first position (layers 1-4) of the second slot (FIG. 3). Conclusion THIS ACTION IS MADE FINAL. 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 MINKI CHANG whose telephone number is (571)270-0521. The examiner can normally be reached 9:00 AM - 5:00 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, 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. /MINKI CHANG/ Examiner, Art Unit 2834 /OLUSEYE IWARERE/ Supervisory Patent Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Jan 04, 2024
Application Filed
Sep 04, 2025
Non-Final Rejection — §102, §103
Nov 11, 2025
Response Filed
Feb 10, 2026
Final Rejection — §102, §103
Mar 25, 2026
Interview Requested
Apr 02, 2026
Applicant Interview (Telephonic)
Apr 02, 2026
Examiner Interview Summary

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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
72%
Grant Probability
82%
With Interview (+10.3%)
2y 9m
Median Time to Grant
Moderate
PTA Risk
Based on 389 resolved cases by this examiner. Grant probability derived from career allow rate.

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