Prosecution Insights
Last updated: August 18, 2026
Application No. 18/266,363

METHOD FOR MANUFACTURING STATOR FOR ROTARY ELECTRIC MACHINE

Final Rejection §103
Filed
Jun 09, 2023
Priority
Mar 18, 2021 — JP 2021-044671 +1 more
Examiner
KIM, PAUL D
Art Unit
3729
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Denso Corporation
OA Round
2 (Final)
88%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
94%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allowance Rate
1367 granted / 1559 resolved
+17.7% vs TC avg
Moderate +7% lift
Without
With
+6.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
63 currently pending
Career history
1613
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
37.6%
-2.4% vs TC avg
§102
26.9%
-13.1% vs TC avg
§112
32.4%
-7.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1559 resolved cases

Office Action

§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 . This office action is a response to the amendment filed on 5/15/2026. 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. Claims 1-3, 5 and 8-12 are rejected under 35 U.S.C. 103 as being unpatentable over Nakano et al. (JP-2016189657 A) in view of Sakata et al. (JP 2019115188 A1). Nakano et al. teach a process of making a stator (20) for a rotary electric machine, comprising steps of: an installation step of installing coil pieces (30) for a stator coil in a stator core as shown in Fig. 1 (paragraph [0022]); and a joining step of joining two ends, which are either ends of adjacent coil pieces of the coil pieces or an end of a coil piece of the coil pieces and an end of a busbar, by laser welding (12) after the installation step as shown in Fig. 5 (paragraphs [0023], [0027], [0038]), wherein the joining step includes a setting step of bringing the two ends to be joined into contact with each other such that a first end of the two ends has a first non-contact surface continuous with a first contact surface and a second end of the two ends has a second non-contact surface continuous with a second contact surface as shown in Fig. 6 (a), wherein the first contact surface is in contact with the second contact surface, the first non-contact surface is not in contact with the second end and the second non-contact surface is not in contact with the first end, and wherein the first non-contact surface is positioned such that the first non-contact surface does not overlap the second end and the second non-contact surface is positioned such that the second non-contact surface does not overlap the first end as shown in Fig. 6 (a) (paragraphs [0040]-[0045]). PNG media_image1.png 396 436 media_image1.png Greyscale However, Nakano et al. fail to teach an image recognition step of detecting, after the setting step, image features related to the first non-contact surface and the second non-contact surface in an image obtained by imaging the two ends, and a determination step of determining, after the image recognition step, a laser radiation position based on the image features related to the first non-contact surface and the second non-contact surface subjected to image recognition. Sakata et al. teach a process of manufacturing a stator for a rotary electric machine, including steps of: an image recognition step of detecting, after the setting step, image features related to non-contact surfaces continuous with contact surfaces of the two ends in an image obtained by imaging the two ends by an imaging unit (102) as shown in Fig. 3, and a determination step of determining, after the image recognition step, a laser radiation position based on the image features related to the non-contact surfaces subjected to image recognition as shown in Figs. 4 and 5 (see also paragraphs [0023]-[0029]). Therefore, it would have been obvious to one of ordinary skill in the art, at the time of the effective filing date of the claimed invention was made, to a person having ordinary skill in the art to modify a process of fabricating a stator for a rotary electric machine of Nakano et al. by an image recognition step with a determination step as taught by Sakata et al. in order to provide proper joining between the first coil and the second coil in the stator core. Re. claim 2: Sakata et al. also teach that the image recognition step includes detecting the image features related to the non-contact surfaces at the two ends by the imaging unit as shown in Fig. 3 (see also paragraphs [0023] and [0026]). Re. claim 3: Sakata et al. also teach that the determination step includes linearly changing the laser radiation position based on a straight line passing through pixel positions related to the image features in the image or portions near the pixel positions as shown in Figs. 4 and 5 (see also paragraphs [0027]-[0030]). Re. claims 5 and 8-12: Nakano et al. also teach that the setting step includes positioning the two ends with a jig (41), and the non-contact surfaces face the jig with clearances in a direction perpendicular to the non-contact surfaces as shown in Figs. 2 and 5. Claims 4, 6 and 7 are rejected under 35 U.S.C. 103 as being unpatentable over Nakano et al. in view of Sakata et al. as applied to claim 1 above, and further in view of Kojima et al. (PGPub 2015/0364891 A1). Nakano et al., modified by Sakata et al., teach all limitations as set forth above including the image, which is captured by a camera (such as the imaging unit), is positioned so that an optical axis extends along the non-contact surfaces as shown in Fig. 3, but silent the image features include edges having brightness differences in a direction intersecting the non-contact surfaces in the image (as per claims 4, 6 and 7). Kojima et al. teach a process of making an electrical device including an imaging unit captured image features having brightness differences in a surfaces in an image in order to define an irradiation position by a laser to a welding portion (see also paragraph [0171]). Therefore, it would have been obvious to one of ordinary skill in the art, at the time of the effective filing date of the claimed invention was made, to a person having ordinary skill in the art to modify a process of fabricating a stator for a rotary electric machine of Nakano et al., modified by Sakata et al., by providing brightness differences in a surfaces in an image as taught by Kojima et al. in order to define an irradiation position by a laser to a welding portion. Response to Arguments Applicant’s arguments with respect to claims 1-12 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. 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 PAUL D KIM whose telephone number is (571)272-4565. The examiner can normally be reached Monday-Friday: 6:00 AM-2:00 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, Thomas Hong can be reached at 571-272-0993. 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. /PAUL D KIM/Primary Examiner, Art Unit 3729
Read full office action

Prosecution Timeline

Jun 09, 2023
Application Filed
Feb 19, 2026
Non-Final Rejection mailed — §103
Apr 30, 2026
Applicant Interview (Telephonic)
Apr 30, 2026
Examiner Interview Summary
May 15, 2026
Response Filed
Jul 24, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

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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
88%
Grant Probability
94%
With Interview (+6.7%)
2y 9m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1559 resolved cases by this examiner. Grant probability derived from career allowance rate.

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