Prosecution Insights
Last updated: April 19, 2026
Application No. 17/969,832

COIL DEVICE AND ELECTRONIC CIRCUIT

Non-Final OA §102§103
Filed
Oct 20, 2022
Examiner
HOSSAIN, KAZI S
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
TDK Corporation
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
3y 1m
To Grant
96%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allow Rate
485 granted / 610 resolved
+11.5% vs TC avg
Strong +16% interview lift
Without
With
+16.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
34 currently pending
Career history
644
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
66.6%
+26.6% vs TC avg
§102
24.1%
-15.9% vs TC avg
§112
5.9%
-34.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 610 resolved cases

Office Action

§102 §103
DETAILED ACTION 1. The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . 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)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. 2. Claims 1-4 and 7-9 are rejected under 35 U.S.C. 102(a)(2) as being anticipated by Kobayashi (US 20230238166 A1). Regarding Claim 1: Kobayashi teaches that A coil device comprising: a first conductor (12S, Drawing: 1); a second conductor (12P, Drawing: 1) located inside the first conductor; a first inner core (11F) located inside the second conductor; and a second inner core (232, Drawing:1) located between the first conductor and the second conductor. (Note: The Examiner interpret 232, 40a, 41-43 as inner core, extension, first part and second part as shown in Drawing 1 in view of Applicant disclosure of as an inner core, extension, first part and second part in Fig. 4) PNG media_image1.png 433 694 media_image1.png Greyscale Drawing: 1, an annotated version of Fig.6 Regarding Claim 2: As applied to claim 1, Kobayashi teaches that the second conductor comprises an extension (40a, Drawing: 1) extending along the first conductor, the extension comprises a first part (43, Drawing: 1), extending away from the first conductor, and a second part (41, Drawing: 1), extending closer to the first conductor than the first part (construed from Drawing: 1; i.e. d2<d1), and the second inner core locates between the first part and the first conductor. Regarding Claim 3: As applied to claim 1, Kobayashi teaches that further comprising an outer leg (11Y), wherein the outer leg and the first inner core form a closed magnetic circuit. Regarding Claim 4: As applied to claim 1, Kobayashi teaches that the first inner core and the second inner core comprise the same magnetic material (see para 0026-0028). Regarding Claim 7: As applied to claim 1, Kobayashi teaches that the first inner core and the second inner core comprise a molding material including a magnetic material and a resin material (see Fig. 1 and para 0025). Regarding Claim 8: As applied to claim 1, Kobayashi teaches that an electronic circuit comprising the coil device (i.e. 12P and 12S formed coil device; see Fig. 1). Regarding Claim 9: As applied to claim 8, Kobayashi teaches that multiple coil devices (construed from Fig. 1). 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 of this title, 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. 3. Claims 5-6 are rejected under 35 U.S.C. 103 as being unpatentable over Kobayashi in view of Yamamoto (US 20230100669 A1). Regarding Claim 5: As applied to claim 1, Kobayashi teaches the first inner core and the second inner core except the first inner core and the second inner core each comprises a different magnetic material. However, Yamamoto teaches that the first core portion and the second core portion are constituted by compacts made of different materials (see claim 1). It would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to have the first inner core and the second inner core each comprises a different magnetic material to provide a reactor that can easily adjust inductance and heat dissipation without increasing the size of the reactor (see para 0019). Regarding Claim 6: As applied to claim 6, the modified Kobayashi teaches that the material of the second inner core has a lower magnetic permeability than the material of the first inner core (see para 0034). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. A list of pertinent prior art is attached in form 892. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Kazi Hossain whose telephone number is 571-272-8182. The examiner can normally be reached on Monday-Thursday from Monday to Thursday 8:00 AM to 4:30 PM (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 https:/www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Shawki Ismail can be reached on 571-272-3985. 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. /KAZI HOSSAIN/ Examiner, Art Unit 2837 /SHAWKI S ISMAIL/Supervisory Patent Examiner, Art Unit 2837
Read full office action

Prosecution Timeline

Oct 20, 2022
Application Filed
Nov 04, 2025
Non-Final Rejection — §102, §103
Mar 06, 2026
Examiner Interview Summary
Mar 06, 2026
Applicant Interview (Telephonic)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12603220
COIL COMPONENT
2y 5m to grant Granted Apr 14, 2026
Patent 12597548
INDUCTOR DEVICE
2y 5m to grant Granted Apr 07, 2026
Patent 12586699
COIL COMPONENT
2y 5m to grant Granted Mar 24, 2026
Patent 12586706
COIL COMPONENT AND METHOD OF MANUFACTURING THE SAME
2y 5m to grant Granted Mar 24, 2026
Patent 12580118
MULTI-LAYER INDUCTOR
2y 5m to grant Granted Mar 17, 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
80%
Grant Probability
96%
With Interview (+16.3%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 610 resolved cases by this examiner. Grant probability derived from career allow rate.

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