Prosecution Insights
Last updated: October 02, 2026
Application No. 18/252,784

ROTOR AND ROTARY ELECTRIC MACHINE

Final Rejection §112
Filed
May 12, 2023
Priority
Nov 16, 2020 — JP 2020-190581 +1 more
Examiner
SETZER, NICHOLAS LEE
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Hitachi Ltd.
OA Round
4 (Final)
68%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
45 granted / 66 resolved
At TC average
Strong +41% interview lift
Without
With
+41.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
32 currently pending
Career history
88
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
51.2%
+11.2% vs TC avg
§102
24.9%
-15.1% vs TC avg
§112
23.4%
-16.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 66 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 . This Office Action is responsive to the Applicant's communication filed July 13, 2026. In view of this communication and the amendment concurrently filed: claims 1-6 were previously pending; no claims were cancelled and no claims were added by amendment; and thus, claims 1-6 are now pending in the application. Response to Arguments Applicant's arguments filed July 13, 2026 have been fully considered. The Applicant's first point (page 4-9 of Remarks) amends claim 1 to include the limitation, “the refrigerant supply hole configured to extend in a circumferential direction around the shaft.” This limitation overcomes the current grounds of rejection and is deemed to contain allowable material. However, the newly added limitation contains subject matter not supported by the disclosure of the present invention. More detail on allowability and new subject matter is provided below. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claim 1 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 1 was amended to include limitation, “the refrigerant supply hole configured to extend in a circumferential direction around the shaft” this limitation is found by the examiner to have new material not previously prevented in the application. The present application has been found to contain sources of, “a circumferential length of the refrigerant supply hole 31 as L2”[0026], but no indication of the refrigerant supply hole 31 extending in the circumferential direction. Stating that the refrigerant supply hole 31 has a circumferential dimension L2 does not teach the refrigerant supply hole 31 “to extend in a circumferential direction around the shaft”. The Applicant has not pointed out where the new (or amended) claim is supported, nor does there appear to be a written description of the claim limitation ‘the refrigerant supply hole configured to extend in a circumferential direction around the shaft’ in the application as filed. See Hyatt v. Dudas, 492 F.3d 1365, 1370, 83 USPQ2d 1373, 1376 (Fed. Cir. 2007) or [MPEP] § 2163.04. Claims 2-6 are rejected solely for being dependent to claim 1. Allowable Subject Matter Claims 1-6 are allowed. The following is an examiner' s statement of reasons for allowance: Regarding Claim 1: The following is a statement of reasons for the indication of allowance: The prior art teaches: A rotor, the rotor comprising : a rotor core; a shaft that is hollow and that supports the rotor; and an end plate that is disposed on an end of the rotor in a rotational axis direction, and that forms a passage through which a refrigerant flows, between the end plate and the rotor core, wherein the end plate includes a plurality of ribs that come into contact with the shaft, the passage includes a refrigerant entry portion that is provided between the plurality of ribs and the shaft, and a refrigerant exit portion that communicatively connects the refrigerant entry portion to an outer peripheral surface of the end plate, wherein the refrigerant entry portion abuts an outer circumference of the shaft; the shaft has a refrigerant supply hole perpendicular to the shaft and the refrigerant entry portion and directly connecting the refrigerant entry portion to an internal portion of the shaft, the refrigerant supply hole configured to supply refrigerant to the refrigerant exit portion about the outer circumference of the shaft via the refrigerant entry portion, and a circumferential length of the refrigerant entry portion along an innermost diameter is larger than a circumferential length of the refrigerant supply hole. However, the prior art does not teach: the refrigerant supply hole configured to extend in a circumferential direction around the shaft (The underlined is allowable subject matter.) Claim 1 is allowed, and not rejected, because the limitation of the refrigerant supply hole configured to extend in a circumferential direction around the shaft is too specific which makes it novel. Claims 2-6 are also allowed because they depend from allowed claims 1. As allowable subject matter has been indicated, applicant's reply must either comply with all formal requirements or specifically traverse each requirement not complied with. See 37 CFR 1.111(b) and MPEP § 707.07(a). 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 NICHOLAS L SETZER whose telephone number is (571)272-3021. The examiner can normally be reached Mon-Fri, 8am-5pm 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, Oluseye 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. /N.L.S./Examiner, Art Unit 2834 /OLUSEYE IWARERE/Supervisory Patent Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Show 1 earlier event
Mar 11, 2025
Non-Final Rejection mailed — §112
Jul 11, 2025
Response Filed
Aug 01, 2025
Final Rejection mailed — §112
Dec 24, 2025
Request for Continued Examination
Jan 14, 2026
Response after Non-Final Action
Mar 13, 2026
Non-Final Rejection mailed — §112
Jul 13, 2026
Response Filed
Aug 24, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12744433
ELECTRICAL MACHINE
3y 1m to grant Granted Sep 22, 2026
Patent 12738828
LINEAR DRIVE FOR TRACK-GUIDED MEANS OF LAND TRANSPORTATION OR RAILWAY VEHICLES
2y 10m to grant Granted Sep 15, 2026
Patent 12732058
COOLING ASSEMBLY, INSERT AND DRIVE ASSEMBLY HAVING A COOLING ASSEMBLY OF THIS KIND
3y 0m to grant Granted Sep 08, 2026
Patent 12732060
DRIVE DEVICE WITH ELECTRIC MOTOR
2y 8m to grant Granted Sep 08, 2026
Patent 12710438
POSITIONING SYSTEM
3y 3m to grant Granted Aug 18, 2026
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
68%
Grant Probability
99%
With Interview (+41.2%)
2y 7m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 66 resolved cases by this examiner. Grant probability derived from career allowance rate.

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