Prosecution Insights
Last updated: October 02, 2026
Application No. 18/992,853

COOLING SYSTEM FOR ROTARY ELECTRIC MACHINE

Non-Final OA §102
Filed
Jan 09, 2025
Priority
Jul 13, 2022 — nonprovisional of PCTJP2022027547
Examiner
VAZIRI, MASOUD
Art Unit
Tech Center
Assignee
Hitachi Ltd.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
8m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
124 granted / 168 resolved
+13.8% vs TC avg
Moderate +8% lift
Without
With
+8.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
13 currently pending
Career history
176
Total Applications
across all art units

Statute-Specific Performance

§101
2.5%
-37.5% vs TC avg
§103
56.3%
+16.3% vs TC avg
§102
27.5%
-12.5% vs TC avg
§112
12.9%
-27.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 168 resolved cases

Office Action

§102
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 . Claims 1-10 are pending. 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 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. PNG media_image1.png 583 707 media_image1.png Greyscale Claim 1 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Li et al. (CN 113078776 A). Regarding claim 1, Li discloses a cooling system for a rotary electric machine including a stator and a rotor (see annotated fig. 1), the cooling system comprising: a coolant flow path supplying a coolant (see the arrows showing the coolant flow path); a switching mechanism (valve, annotated fig. 1) switching the mode of the coolant flow path (capable of blocking one coolant flow path by closing the valve); and a pump (pump, annotated fig. 1) pumping the coolant to the coolant flow path (implied), wherein the coolant flow path has a first coolant flow path section supplying the coolant to a core of the stator (when the valve is closed), and a second coolant flow path section supplying the coolant to the rotor (when the valve is closed), and the switching mechanism (the valve) is configured to achieve a first mode in which the coolant is supplied to the first coolant flow path section and the coolant is not supplied to the second coolant flow path section (pumping coolant into the stator and blocking the coolant flow into the rotor by closing the valve), and a second mode in which the downstream of the first coolant flow path section (downstream, annotated fig. 1) and the upstream of the second coolant flow path section (upstream, annotated fig. 1) are made to communicate with each other (coolant exiting the stator flows into the second coolant path after passing through the open valve). Allowable Subject Matter Claims 2-10 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. 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 Any inquiry concerning this communication or earlier communications from the examiner should be directed to MASOUD VAZIRI whose telephone number is (571)272-2340. The examiner can normally be reached M-F, 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, the examiner’s supervisor, SEYE IWARERE can be reached on (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. /MASOUD VAZIRI/Examiner, Art Unit 2834 /OLUSEYE IWARERE/Supervisory Patent Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Jan 09, 2025
Application Filed
Aug 25, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12749941
BRUSHLESS MOTOR
2y 8m to grant Granted Sep 29, 2026
Patent 12749936
ROTOR ARRANGEMENT FOR IMPROVED COOLING OF A ROTOR
2y 4m to grant Granted Sep 29, 2026
Patent 12738799
MOTOR RADIATOR
2y 6m to grant Granted Sep 15, 2026
Patent 12738812
DISCHARGE DEVICE FOR DISCHARGING ELECTRICAL CURRENTS AND MACHINE COMPRISING SUCH A DISCHARGE DEVICE
2y 5m to grant Granted Sep 15, 2026
Patent 12726057
FAN MOTOR AND HAIR DRYER COMPRISING SAME
3y 7m to grant Granted Sep 01, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
74%
Grant Probability
82%
With Interview (+8.0%)
2y 5m (~8m remaining)
Median Time to Grant
Low
PTA Risk
Based on 168 resolved cases by this examiner. Grant probability derived from career allowance rate.

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