Prosecution Insights
Last updated: July 17, 2026
Application No. 18/398,787

ROTOR CORE, ROTOR, AND MANUFACTURING METHOD OF ROTOR CORE

Non-Final OA §102
Filed
Dec 28, 2023
Priority
Jan 12, 2023 — JP 2023-003033
Examiner
TRUONG, THOMAS
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Toyota Motor Corporation
OA Round
2 (Non-Final)
73%
Grant Probability
Favorable
2-3
OA Rounds
1m
Est. Remaining
89%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
939 granted / 1282 resolved
+5.2% vs TC avg
Strong +16% interview lift
Without
With
+15.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
32 currently pending
Career history
1312
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
87.3%
+47.3% vs TC avg
§102
4.4%
-35.6% vs TC avg
§112
7.0%
-33.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1282 resolved cases

Office Action

§102
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 . Allowable Subject Matter The indicated allowability of the pending claims are withdrawn in view of the newly discovered reference(s) to Sugiyama (JP 2011172441). Rejections based on the newly cited reference(s) follow. Claim Rejections - 35 USC § 102 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, 4 and 6-8 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Sugiyama (JP 2011172441, cited on IDS filed 06/12/2026). RE claim 1, Sugiyama teaches a rotor core 21 (Figs.1-7) comprising: a first electromagnetic steel plate 22B; and a second electromagnetic steel plate 22A laminated in an axial direction of the rotor core 21 together with the first electromagnetic steel plate 22B (Figs.1, 3, 4), wherein: the second electromagnetic steel plate 22A has a plurality of protrusion portions 25 each extending toward a magnet 24 to be fixed; and each of the protrusion portions 25 (see annotated Fig.2 below) has: an extension portion (EP) extending from the second electromagnetic steel plate 22A toward the magnet 24 so as to be perpendicular to the axial direction (direction of magnet inserted, see Figs.1, 3), an abutment portion (AP) that bends along one side in the axial direction and has a curved surface capable of abutting against the magnet 24 (see Fig.2), and a tip portion (TP) extending from the abutment portion (AP) toward an opposite side of the magnet 24; the second electromagnetic steel plate 22A has an extension base portion (EBP) at part of an inner surface of a slot 23 of the magnet 24; and the extension portion (EP) is extending toward an end surface of the magnet 24 from the second electromagnetic steel plate 22A so as to maintain the laminated position of the second electromagnetic steel plate 22A (functional language, because Sugiyama disclosed the same structure as claimed/disclosed, therefore, Sugiyama’s extension portion EP is capable of perform the functional language of “to maintain the laminated position of the second electromagnetic steel plate”). [AltContent: textbox (Extension base portion (EBP))] [AltContent: textbox (Extension portion (EP))][AltContent: arrow] [AltContent: textbox (Tip portion (TP))][AltContent: textbox (Abutment portion with curved surface (AP))][AltContent: arrow][AltContent: arrow][AltContent: arrow] PNG media_image1.png 306 432 media_image1.png Greyscale RE claim 4/1, Sugiyama teaches the tip portion (TP) is folded to face the laminated first electromagnetic steel plate 22B and/or the second electromagnetic steel plate with a gap in-between (see Fig.2). RE claim 6/1, Sugiyama teaches the magnet slot 23 includes a through hole 23 through which an elongated cross-section of the magnet 24 can be arranged along a circumferential direction of the rotor core 21 (Fig.1); and the extension portion (EP) is in the magnet slot 23 and extends from the second electromagnetic steel plate 22A toward a long end surface of the magnet 24 on an inner side of the rotor core 21 in a radial direction of the rotor core so as to be perpendicular to the axial direction (Figs.1, 3, 4). RE claim 7, Sugiyama teaches a rotor (Figs.1-4) comprising: a rotor core 21; and a magnet 24 fixed to the rotor core 21, wherein the rotor core 21 includes a first electromagnetic steel plate 22B and a second electromagnetic steel plate 22A laminated alongside the first electromagnetic steel plate 22B in an axial direction of the rotor core 21; the second electromagnetic steel plate 22A has a plurality of protrusion portions 25 each extending toward the magnet 24 in a fixed state; each of the protrusion portions 25 has: an extension portion (EP) (see annotated Fig.2 above) extending from the second electromagnetic steel plate 22A toward the magnet 24 so as to be perpendicular to the axial direction (Fig.2), an abutment portion (AP) that bends along one side in the axial direction and has a curved surface capable of abutting against the magnet 24, and a tip portion (TP) extending from the abutment portion (AP) toward a side opposite to the magnet 24 (Fig.2); the second electromagnetic steel plate 22A has an extension base portion (EBP) at part of an inner surface of a slot 23 of the magnet 24; and the extension portion (EP) is extending toward an end surface of the magnet from the second electromagnetic steel plate 22A so as to maintain the laminated position of the second electromagnetic steel plate 22A (functional language, because Sugiyama disclosed the same structure as claimed/disclosed, therefore, Sugiyama’s extension portion EP is capable of perform the functional language of “to maintain the laminated position of the second electromagnetic steel plate). RE claim 8, Sugiyama teaches a manufacturing method of a rotor core 21 (Figs.1-4) where the rotor core 21 includes a first electromagnetic steel plate 22B and a second electromagnetic steel plate 22A laminated alongside the first electromagnetic steel plate 22B in an axial direction of the rotor core, and the second electromagnetic steel plate 22A has a plurality of protrusion portions 25 each extending toward a magnet 24 to be fixed, the method comprising: preparing the first electromagnetic steel plate 22 by punching (see translation ¶ 18) preparing the second electromagnetic steel plate 22 having each of the protrusion portions 25 by punching (¶ 18) bending and deforming each of the protrusion portions 25 to have: an extension portion (EP) extending from the second electromagnetic steel plate 22A toward the magnet 24 so as to be perpendicular to the axial direction (Figs.1-4), an abutment portion (AP) that bends along one side in the axial direction and has a curved surface capable of abutting against the magnet 24 (see annotated Fig.2 above), a tip portion (TP) extending from the abutment portion (AP) toward an opposite side of the magnet 24, wherein the second electromagnetic steel plate 22A has an extension base portion (EBP) at part of an inner surface of a slot 23 of the magnet 24, and the extension portion (EP) is extending toward an end surface of the magnet 24 from the second electromagnetic steel plate 22A so as to maintain the laminated position of the second electromagnetic steel plate 22A (functional language, because Sugiyama disclosed the same structure as claimed/disclosed, therefore, Sugiyama’s extension portion EP is capable of perform the functional language of “to maintain the laminated position of the second electromagnetic steel plate”); and laminating the first electromagnetic steel plate 22B and the second electromagnetic steel plate 22B (Figs.1-4 and ¶ 18). Conclusion 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

Dec 28, 2023
Application Filed
Sep 04, 2025
Non-Final Rejection mailed — §102
Dec 02, 2025
Response Filed
Jun 12, 2026
Request for Continued Examination
Jun 17, 2026
Response after Non-Final Action
Jun 23, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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WIRING BOARD, ROTATING MACHINE, AND ROTATING DEVICE
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Patent 12683443
ROTOR STRUCTURE, ELECTRIC MOTOR STRUCTURE, AND CLOTHING TREATING DEVICE
2y 6m to grant Granted Jul 14, 2026
Patent 12683526
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Patent 12683446
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2y 4m to grant Granted Jul 14, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
73%
Grant Probability
89%
With Interview (+15.9%)
2y 8m (~1m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1282 resolved cases by this examiner. Grant probability derived from career allowance rate.

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