Prosecution Insights
Last updated: May 29, 2026
Application No. 18/354,343

SUPERCONDUCTING ELECTROMAGNET DEVICE AND COOLING METHOD OF SUPERCONDUCTING ELECTROMAGNET DEVICE

Final Rejection §103
Filed
Jul 18, 2023
Priority
Mar 02, 2021 — JP 2021-032355 +1 more
Examiner
TALPALATSKI, ALEXANDER
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Toshiba Energy Systems & Solutions Corporation
OA Round
2 (Final)
72%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
81%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
601 granted / 834 resolved
+4.1% vs TC avg
Moderate +9% lift
Without
With
+9.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
28 currently pending
Career history
877
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
81.2%
+41.2% vs TC avg
§102
7.2%
-32.8% vs TC avg
§112
0.9%
-39.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 834 resolved cases

Office Action

§103
DETAILED ACTION Response to Arguments Applicant’s arguments with respect to the amended claim language of claim 1 have been considered but are moot in view of new grounds of rejection. The applicant argues that the prior art “does not satisfy the "plurality of strip-shaped circumferential cooling sheets "and" plurality of strip-shaped axial cooling sheets" as recited in previous claim 1.”” This argument is not persuasive because Overweg clearly teaches parallel and perpendicular strip shaped cooling sheets, as shown in figure 2, that meet the claim limitations of axial and circumferential cooling sheets of claim 1. The applicant further argues that “Overweg does not disclose or suggest that one of the conductor layer 101 and the isolator layer 201 is arrayed each with an interval along a circumferential direction of a superconducting coil, and the other of the conductor layer 101 and the isolator layer 201 is arrayed each with an interval along an axial direction of the superconducting coil, as recited in claim 1.” This argument is not persuasive because Overweg was not used on its own, but in combination with existing prior art discussed in the application. Overweg teaches two perpendicularly extending layers that, in combination with AAPA, meet the claim limitations. 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. Claim(s) 1 and 7-8 is/are rejected under 35 U.S.C. 103 as being unpatentable over AAPA (conventional device discussed in paragraphs 3-4 of the disclosure) in view of Overweg (US 10794973) and Huang et al. (US 8903465). In re claim 1, paragraphs 3-4 (AAPA) disclose a superconducting electromagnet device comprising: a superconducting coil for generating a magnetic field; a cooling mechanism for cooling the superconducting coil; a radiation shield housing the superconducting coil thereinside to prevent heat intrusion from the outside; and a vacuum vessel for vacuum insulation which houses the radiation shield. AAPA does not disclose the claimed details of the circumferential and axial cooling units, or the cooling units being adhered directly to the coil. Overweg however, in figures 1-4, discloses a cooling mechanism having a circumferential cooling unit having a plurality of strip-shaped circumferential cooling sheets (one of 101 or 201; see figure 2 for best detail) arrayed each with an interval along a circumferential direction of the superconducting coil; and an axial cooling unit having a plurality of strip-shaped axial cooling sheets (another one of 101 or 201; see figure 2 for best detail) arrayed each with an interval along an axial direction of the superconducting coil. Therefore it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have adapted strip shaped structure of the cooling unit as taught by Overweg to the device of AAPA in order to provide cooling while improving eddy current resistance (as discussed by Overweg throughout the disclosure, including the abstract). Huang teaches a similar device having a cooling unit (22) that can be made of strip shaped cooling sheets and is directly adhered to the coil (with epoxy, see column 5, lines 6-7). Therefore it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have adhered one of the cooling units of AAPA/Overweg directly to the superconducting coil as taught by Huang to provide a more secure connection between the cooling units and the superconducting coil. In re claim 7, AAPA modified by Overweg discloses that the circumferential cooling unit is disposed at a position nearer to the superconducting coil than the axial cooling unit (any configuration of the cooling unit positioning would have been an obvious matter of design choice). In re claim 8, AAPA modified by Overweg discloses that an insulating sheet (103 in Overweg) is disposed between the circumferential cooling sheet and the axial cooling sheet. 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 Alexander Talpalatski whose telephone number is (571)270-3908. The examiner can normally be reached 10 AM - 6 PM PT. 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, Shawki Ismail can be reached at 5712723985. 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. /Alexander Talpalatski/ Primary Examiner, Art Unit 2837
Read full office action

Prosecution Timeline

Jul 18, 2023
Application Filed
Oct 20, 2025
Non-Final Rejection mailed — §103
Jan 20, 2026
Response Filed
Feb 20, 2026
Final Rejection mailed — §103
Apr 10, 2026
Examiner Interview Summary
Apr 10, 2026
Applicant Interview (Telephonic)
May 20, 2026
Request for Continued Examination
May 22, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12626877
MOVABLE CONTACT PART AND DIRECT CURRENT RELAY COMPRISING SAME
3y 0m to grant Granted May 12, 2026
Patent 12620869
STATOR OF AN ELECTRIC GENERATOR HAVING A REINFORCEMENT STRUCTURE
3y 9m to grant Granted May 05, 2026
Patent 12597576
ELECTROMAGNETIC RELAY
4y 1m to grant Granted Apr 07, 2026
Patent 12567550
CIRCUIT BREAKERS
1y 8m to grant Granted Mar 03, 2026
Patent 12555732
ELECTROMECHANICAL ROTARY LATCH FOR USE IN CURRENT INTERRUPTION DEVICES
3y 10m to grant Granted Feb 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
72%
Grant Probability
81%
With Interview (+9.0%)
2y 7m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 834 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month