Prosecution Insights
Last updated: July 17, 2026
Application No. 18/260,664

STATOR, ROTARY ELECTRIC MACHINE, METHOD FOR MANUFACTURING STATOR, AND METHOD FOR MANUFACTURING ROTARY ELECTRIC MACHINE

Final Rejection §102§103
Filed
Jul 07, 2023
Priority
Apr 05, 2021 — JP 2021-063930 +1 more
Examiner
CHANG, MINKI
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Mitsubishi Electric Corporation
OA Round
4 (Final)
72%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
287 granted / 399 resolved
+3.9% vs TC avg
Moderate +10% lift
Without
With
+10.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
44 currently pending
Career history
438
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
80.1%
+40.1% vs TC avg
§102
8.6%
-31.4% vs TC avg
§112
9.3%
-30.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 399 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 filed 04/21/2026 have been fully considered but they are not persuasive. Applicant argues that “However, the insertion groove 42c and retaining groove 45 in the Yoshikawa reference actually correspond to, if anything, the winding relief groove 36 of the stator at issue. Furthermore, "the winding relief groove 36" and "the opened-ring portion 37a, pillar portion 38b, and base portion 38a" are clearly distinguished each other. Therefore, in Yoshikawa, the insertion groove 42c and retaining groove 45 (corresponding to the winding relief groove 36 of the present claimed stator) do not provide the same unique effect of the presently claimed stator, which is achieved by retaining the jumper wire with the ring-shaped portion 37a, the pillar portion 38a, and the base portion 38b of the present claimed stator. This effect is that "in wiring work of conductors, the jumper wire can be easily deformed by bending, winding, etc., after being retained to the jumper-wire-caught portion" (present description [0068]), as can "the jumper wire can be prevented from getting too close to the magnetic pole piece on its way from the winding relief groove to the winding portion, and the necessary insulation distance can be easily secured" (present description [0068]). The applicant arguing limitations which are not claimed. MPEP 2145 VI states that “Although the claims are interpreted in light of the specification, limitations from the specification are not read into the claims.” As in claim 1, the “winding relief groove 36” is disclosed in the specification and recited in a dependent claim, but is not explicitly recited. Broadest reasonable interpretation is that the jumper wire caught portion as discussed in the rejection below is part of the “opening-ring portion, the pillar portion, and the base portion” as seen in FIG. 2-4. The jumper wire caught portion 42c and 45 are directly adjacent to and attached to the opening-ring portion, the pillar portion, and the base portion, and discloses the limitations of claim 1. Thus, the argument is not persuasive. 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, 3, 6-7 and 11 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yoshikawa et al. (JP 2010-110048 A). Regarding claim 1, Yoshikawa discloses a stator (3) comprising a plurality of magnetic-pole pieces (10) in each of which a tooth portion (8) is integrally formed so as to protrude from an arc-shaped back yoke portion (9) inward in a radial direction, wherein a pair of insulators (5) made of resin are attached to each magnetic-pole piece (10), in an axial direction perpendicular to the radial direction, PNG media_image1.png 157 1092 media_image1.png Greyscale the magnetic-pole pieces (10) with the insulators (5) attached thereto are arranged in an annular shape (FIG 1) in a state in which a conductive wire (6) is continuously wound via a jumper wire (71a, 72a, 73a, see also annotation below) making connection between the magnetic-pole pieces (10), PNG media_image2.png 383 624 media_image2.png Greyscale each insulator (5) has a snap-fit female portion (53, 54) at one end in a circumferential direction of an axial-direction end thereof and has a snap-fit male portion (43, 44) at another end, PNG media_image3.png 220 1086 media_image3.png Greyscale the snap-fit female portion (53, 54) has an opened-ring portion (53) having an opening (54) that opens in a direction perpendicular to the axial direction (FIG 4a), the snap-fit male portion (43, 44) has a pillar portion (43) extending in the axial direction from a base portion (44) protruding in the circumferential direction and the radial direction (FIG 3a), the adjacent magnetic-pole pieces (10) in the annular-shape arrangement are connected swingably (FIG 1, 5) relative to each other via snap-fit connection made by fitting of the pillar portion (43) to the opened-ring portion (53), and a jumper-wire-caught portion (42c, 45) at which the jumper wire (71a, 72a, 73a) is caught is provided at least in one of the opened-ring portion (53), the pillar portion (43; FIG 9), and the base portion (44). Regarding claim 3/1, Yoshikawa was discussed above in claim 1. Yoshikawa further discloses wherein the jumper-wire-caught portion (42c, 45) is at least one of a part of an outer circumferential surface of the pillar portion (43; FIG 3) that is opposite from a rotation center of a rotating electric machine (the jumper-wire-caught portion are on the radially outer side of the insulator), a cutout formed at the outer circumferential surface of the pillar portion (43; FIG 3), a slit formed in the pillar portion (43; FIG 3), a groove (42c) formed at an outer circumferential surface of the base portion (44; FIG 3), a part of an outer circumferential surface of the opened-ring portion (53; FIG 4), a cutout (42c) formed at the outer circumferential surface of the opened-ring portion (53; FIG 4), or a groove (42c) formed at the outer circumferential surface of the opened-ring portion (53; FIG 4). Regarding claim 6/1, Yoshikawa was discussed above in claim 1. Yoshikawa further discloses a rotary electric machine (1) comprising: the stator (3) according to claim 1; and a rotor (4) provided rotatably and coaxially on an inner circumferential surface side of the stator (3). Regarding claim 7/1, Yoshikawa was discussed above in claim 1. Yoshikawa further discloses a stator manufacturing method for the stator (3) according to claim 1, comprising: an insulation assembly step of attaching the insulators (12) to each magnetic-pole piece (10); a wiring step of repeating a winding step of winding (FIG 5), in a concentrated manner, the conductive wire (6) around one magnetic-pole piece (10) having undergone the insulation assembly step, and a jumper wire step of, after the winding step, leading the conductive wire (6) as the jumper wire (71a, 72a, 73a) to the magnetic-pole piece (10) that is a next winding target without cutting the conductive wire (FIG 7, 8); and an annular shaping step of, after winding of the conductive wire (6) is completed for all the magnetic-pole pieces (10) in the wiring step, arranging the magnetic-pole pieces (10) in the annular shape and connecting all the adjacent magnetic-pole pieces (10) by the snap-fit connection of the insulators (12; FIG 9). Regarding claim 11/7, Yoshikawa was discussed above in claim 7. Yoshikawa further discloses a rotary electric machine (1) manufacturing method comprising a step of providing a rotor (4) rotatably and coaxially on an inner circumferential surface side of the stator (3), after a process of the stator manufacturing method according to claim 7. Regarding claim 22/1, Yoshikawa was discussed above in claim 1. Yoshikawa further discloses a portion of the jumper wire (72a, 73a) that is free of slack abuts against a radially outer portion of the jumper-wire-caught portion (42c, 45), and is engaged with the jumper-wire-caught portion (72a, 73a) while bending from the radially outer portion (FIG. 5, 9). 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. 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 2, 8 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP 2010-110048 A) in view of Natsume et al. (JP 2006-254569 A). Regarding claim 2/1, Yoshikawa was discussed above in claim 1. Yoshikawa discloses wherein the base portion (44) is provided such that a gap corresponding to an axial-direction thickness of the opened-ring portion (53) is formed between the base portion (44) and the magnetic-pole piece (10) in the axial direction, and in the snap-fit connected state, the opened-ring portion (53) is held in the gap so that axial-direction displacement is restricted (FIG 2). PNG media_image4.png 752 470 media_image4.png Greyscale Yoshikawa does not disclose the opened-ring portion is at the axial end of the insulator, such that the base portion is in the gap. Natsume discloses the opened-ring portion (21g) is at the axial end of the insulator (4), such that the base portion (22g) is in the gap (FIG 5, 7). It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Yoshikawa in view of Natsume to disclose the opened-ring portion is at the axial end of the insulator, such that the base portion is in the gap, as the swapping the location of the base portion and the opened-ring portion is obvious to try from a finite number of solutions. Regarding claim 8/7, Yoshikawa was discussed above in claim 7. Yoshikawa further discloses with a total of four magnetic-pole pieces (10) including first and second magnetic-pole pieces (10a, 10b) snap-fit connected as a set of two adjacent magnetic-pole pieces and third and fourth magnetic-pole pieces (10a, 10b) snap-fit connected as a set of two adjacent magnetic-pole pieces (FIG 9), the four magnetic-pole pieces (10) regarded as a set (81-83), the sets (81-83) thereof are arranged and assembled in the annular shape such that the number of the sets is a multiple of 3 (FIG 9; three sets of four). Yoshikawa does not disclose wherein in the wiring step, an apparatus is applied, the apparatus including a rotational-positioning mechanism having a rotation axis in a stacking direction of the magnetic-pole piece, and a conductive-wire feeding and winding flyer which feeds the conductive wire while turning about a rotation axis set in a direction perpendicular to the rotation axis of the rotational-positioning mechanism, and the magnetic-pole pieces are attached to the rotational-positioning mechanism, such that the magnetic-pole pieces are arranged with the tooth portions distant from each other in the circumferential direction so as to have a V shape, thereafter, the wiring step includes a winding step 1 of winding the conductive wire around the tooth portion of the first magnetic-pole piece by the flyer, a jumper wire step 1 of rotating the rotational-positioning mechanism so that the second magnetic-pole piece is opposed to the flyer, and arranging the jumper wire, without cutting the conductive wire, a winding step 2 of winding the conductive wire around the tooth portion of the second magnetic-pole piece by the flyer, a jumper wire step 2 of rotating the rotational-positioning mechanism so that the third magnetic-pole piece is opposed to the flyer, and arranging the jumper wire, without cutting the conductive wire, a winding step 3 of winding the conductive wire around the tooth portion of the third magnetic-pole piece by the flyer, a jumper wire step 3 of rotating the rotational-positioning mechanism so that the fourth magnetic-pole piece is opposed to the flyer, and arranging the jumper wire, without cutting the conductive wire, and a winding step 4 of winding the conductive wire around the tooth portion of the fourth magnetic-pole piece by the flyer, and the annular shaping step includes a step of deforming each set of two adjacent magnetic-pole pieces from the V shape into an arc shape. Natsume discloses wherein in the wiring step, an apparatus (31) is applied, the apparatus (31) including a rotational-positioning mechanism (41) having a rotation axis (34) in a stacking direction of the magnetic-pole piece (13), and a conductive-wire feeding and winding flyer (91-93) which feeds the conductive wire (5) while turning about a rotation axis set in a direction perpendicular to the rotation axis (34) of the rotational-positioning mechanism (41), and the magnetic-pole pieces (13) are attached to the rotational-positioning mechanism (41), such that the magnetic-pole pieces are arranged with the tooth portions distant from each other in the circumferential direction so as to have a V shape (FIG 9, 10), thereafter, the wiring step includes a winding step 1 of winding the conductive wire (5) around the tooth portion (8a, 8e, 8i) of the first magnetic-pole piece by the flyer (91-93), a jumper wire step 1 of rotating the rotational-positioning mechanism (41) so that the second magnetic-pole piece is opposed to the flyer (91-93), and arranging the jumper wire, without cutting the conductive wire (5), a winding step 2 of winding the conductive wire (5) around the tooth portion (8d, 8h, 8l) of the second magnetic-pole piece by the flyer (91-93), a jumper wire step 2 of rotating the rotational-positioning mechanism (41) so that the third magnetic-pole piece is opposed to the flyer (91-93), and arranging the jumper wire, without cutting the conductive wire (5), a winding step 3 of winding the conductive wire (5) around the tooth portion (8c, 8g, 8k) of the third magnetic-pole piece by the flyer (91-93), a jumper wire step 3 of rotating the rotational-positioning mechanism (41) so that the fourth magnetic-pole piece is opposed to the flyer (91-93), and arranging the jumper wire, without cutting the conductive wire (5), and a winding step 4 of winding the conductive wire (5) around the tooth portion (8b, 8f, 8j) of the fourth magnetic-pole piece by the flyer (91-93), and the annular shaping step includes a step of deforming each set of two adjacent magnetic-pole pieces (13) from the V shape into an arc shape. PNG media_image5.png 188 1098 media_image5.png Greyscale It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Yoshikawa in view of Natsume to disclose the limitations of claim 8 above, for the advantages of shortening the manufacturing time of the stator. PNG media_image6.png 527 1098 media_image6.png Greyscale Regarding claim 15/2, Yoshikawa in view of Natsume was discussed above in claim 2. Yoshikawa further discloses wherein the jumper-wire-caught portion (42c, 45) is at least one of a part of an outer circumferential surface of the pillar portion (43; FIG 3), a cutout formed at the outer circumferential surface of the pillar portion (43; FIG 3), a slit formed in the pillar portion (43; FIG 3), a groove formed at an outer circumferential surface of the base portion (44; FIG 3), a part of an outer circumferential surface of the opened-ring portion (53; FIG 4), a cutout formed at the outer circumferential surface of the opened-ring portion (53; FIG 4), or a groove formed at the outer circumferential surface of the opened-ring portion (53; FIG 4). Claims 4 and 20 are rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP 2010-110048 A) in view of Amaya et al. (US 2021/0257873). Regarding claim 4/1, Yoshikawa was discussed above in claim 1. Yoshikawa does not disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin. Amaya discloses the stator (30) is molded with resin (80; FIG 6, 7). Yoshikawa would be modified to mold the stator (30) in resin to cover the stator coil ends and the jumper-wire-caught portions. It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Yoshikawa in view of Amaya to disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin, for the advantages of insulating the coil ends and the molded resin acting as a heat transfer to cool the stator (¶ [0045]). Regarding claim 20/3, Yoshikawa was discussed above in claim 3. Yoshikawa does not disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin. Amaya discloses the stator (30) is molded with resin (80; FIG 6, 7). Yoshikawa would be modified to mold the stator (30) in resin to cover the stator coil ends and the jumper-wire-caught portions. It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Yoshikawa in view of Amaya to disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin, for the advantages of insulating the coil ends and the molded resin acting as a heat transfer to cool the stator (¶ [0045]). Claim 19 is rejected under 35 U.S.C. 103 as being unpatentable over Yoshikawa et al. (JP 2010-110048 A) in view of Natsume et al. (JP 2006-254569 A) as applied to claim 2 above, and further in view of Amaya et al. (US 2021/0257873). Regarding claim 19/2, Yoshikawa in view of Natsume was discussed above in claim 2. Yoshikawa in view of Natsume does not disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin. Amaya discloses the stator (30) is molded with resin (80; FIG 6, 7). Yoshikawa would be modified to mold the stator (30) in resin to cover the stator coil ends and the jumper-wire-caught portions. It would have been obvious to one of ordinary skill in the art before the effective filing of the claimed invention to have modified Yoshikawa in view of Natsume, further in view of Amaya to disclose wherein parts of all the magnetic-pole pieces and at least a part of the jumper-wire-caught portion are molded with resin, for the advantages of insulating the coil ends and the molded resin acting as a heat transfer to cool the stator (¶ [0045]). Allowable Subject Matter Claims 5, 9-10, 12-14, 16-18, 21 and 23-24 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. Regarding claims 5, 9-10, 12-14 and 16-18, the allowable subject matter of the claims has been discussed in the Non-Final Rejection mailed 04/23/2025. Regarding claim 21, the allowability of the claim was discussed in the Final Rejection mailed 09/25/2025. Regarding claim 23/1, the specific limitation of “a plurality of winding relief grooves (36) configured to allow a winding start portion and a winding end portion of the conductive wire (20) to extend radially outward so as to prevent interference with the winding, wherein a virtual circle defined by connecting the plurality of jumper-wire-caught portions (40) is located radially outward of a virtual circle defined by connecting the plurality of winding relief grooves (36), and the jumper wire (22) is retained by the jumper-wire-caught portions (40) at a position radially outward of the winding relief grooves (36; FIG. 12)” in the combination as claimed are neither anticipated nor made obvious over the prior art made of record. Yoshikawa discloses a jumper wire caught portions and winding relief grooves, but does not disclose a virtual circle a virtual circle defined by connecting the plurality of jumper-wire-caught portions is located radially outward of a virtual circle defined by connecting the plurality of winding relief grooves, and the jumper wire is retained by the jumper-wire-caught portions at a position radially outward of the winding relief grooves. Claim 24 is allowable for depending upon claim 23. 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 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

Show 2 earlier events
Jul 23, 2025
Response Filed
Sep 25, 2025
Final Rejection mailed — §102, §103
Nov 18, 2025
Response after Non-Final Action
Dec 24, 2025
Request for Continued Examination
Jan 14, 2026
Response after Non-Final Action
Jan 22, 2026
Non-Final Rejection mailed — §102, §103
Apr 21, 2026
Response Filed
Jun 30, 2026
Final Rejection mailed — §102, §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

5-6
Expected OA Rounds
72%
Grant Probability
82%
With Interview (+10.2%)
2y 9m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 399 resolved cases by this examiner. Grant probability derived from career allowance rate.

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