Prosecution Insights
Last updated: July 17, 2026
Application No. 17/989,609

TRANSFORMER

Non-Final OA §103
Filed
Nov 17, 2022
Priority
Aug 04, 2022 — CN 202210931533.6
Examiner
LIAN, MANG TIN BIK
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Delta Electronics Inc.
OA Round
3 (Non-Final)
70%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allowance Rate
933 granted / 1330 resolved
+2.2% vs TC avg
Strong +26% interview lift
Without
With
+26.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
68 currently pending
Career history
1401
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
91.7%
+51.7% vs TC avg
§102
6.4%
-33.6% vs TC avg
§112
1.2%
-38.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1330 resolved cases

Office Action

§103
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 . Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 04/23/2026 has been entered. Response to Arguments Applicant’s arguments with respect to claims 1-6 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Claim Rejections - 35 USC § 103 Claims 1-3 and 6 are rejected under 35 U.S.C. 103 as being unpatentable over Lin et al. (U.S. PG. Pub. No. 2010/0026437 A1) in view of Imada et al. (U.S. PG. Pub. No. 2013/0063240 A1) and (U.S. PG. Pub. No. 2004/0113739 A1). With respect to claim 1, Lin et al., hereinafter referred to as “Lin,” teaches a transformer 2 (FIGs. 2A-3B), comprising: a magnetic core assembly 23 comprising a first magnetic core and a second magnetic core; a bobbin 21 comprising a bobbin main body (the body of bobbin 21), a bobbin channel 212 and a winding portion 211, wherein the bobbin channel runs through two opposite sides of the bobbin main body, and the winding portion is formed on an outer periphery surface (wall on which primary winding is wound) of the bobbin main body, the bobbin main body comprises a first receiving portion 21a (annotated FIG. 3A), and the first receiving portion is connected with the bobbin main body; wherein a first cover part (yoke) of the first magnetic core is in direct contact with the first receiving portion (para. [0031]). PNG media_image1.png 694 552 media_image1.png Greyscale Lin does not expressly teach two first windings disposed around the winding portion, wherein one of the two first windings is disposed between the other one of the two first windings and the outer periphery surface of the bobbin main body; a second winding disposed around the winding portion and disposed between the two first windings. Imada et al., hereinafter referred to as “Imada,” teaches a transformer 20 (FIGs. 4-5), comprising: two first windings P11a and any of P12a, P2 or P3 disposed around the winding portion 12a, wherein one of the two first windings is disposed between the other one of the two first windings and the outer periphery surface of the bobbin main body; a second winding (e.g. winding S11) disposed around the winding portion and disposed between the two first windings (paras. [0048]-[0052]). 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 and second windings as taught by Imada to the transformer of Lin to improve magnetic coupling between first and second windings. Lin does not also expressly teach at least one circuit board comprising a circuit board hole, wherein the circuit board hole and the bobbin channel are communicated with each other, and the magnetic core assembly partially penetrates through the circuit board hole and the bobbin channel, wherein the at least one circuit board comprises a first circuit board, wherein a first cover part of the first magnetic core is in direct contact with both the first circuit board and the first receiving portion. Du et al., hereinafter referred to as “Du,” teaches a transformer 5 (FIGs. 2A-2E) comprising: at least one circuit board 40 and or 45 comprising a circuit board hole (center aperture, FIG. 2A), wherein the circuit board hole and the bobbin channel (central channel of bobbin 701, FIG. 2D) are communicated with each other, and the magnetic core assembly 10 and 20 partially penetrates through the circuit board hole and the bobbin channel, wherein at least one circuit board comprise a first circuit board 40 or 45, wherein a first cover part of the first magnetic core is in direct contact with both the first circuit board and the first receiving portion (paras. [0035]-[0036]). The combination of Du to Lin would result in “wherein the at least one circuit board comprises a first circuit board, wherein a first cover part of the first magnetic core is in direct contact with both the first circuit board and the first receiving portion” as claimed. Therefore, 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 circuit board as taught by Du to the transformer of LIn to simplify electric design and reduce manufacturing cost and size (paras. [0004]-[0005]). With respect to claim 2, Lin in view of Imada and Du teaches the transformer according to claim 1, wherein the at least one circuit board further comprises a second circuit board (Du, the other of circuit board 40 or 50), t the first circuit board is disposed between the first magnetic core and the bobbin main body and comprises a first circuit board hole (center aperture of circuit board 40), the second circuit board is disposed between the second magnetic core and the bobbin main body and comprises a second circuit board hole (center aperture of circuit board 40), the first circuit board hole, the second circuit board hole and the bobbin channel are communicated with each other, and the magnetic core assembly partially penetrates through the first circuit board hole, the second circuit board hole and the bobbin channel (Du, para. [0036]). With respect to claim 3, Lin in view of Imada and Du teaches the transformer according to claim 2, wherein the first magnetic core comprises the first cover part (yoke), a first lateral core part (first outer leg), a second lateral core part (second outer leg) and a first middle core part (first middle leg), the first lateral core part and the second lateral core part are connected with two opposite sides of the first cover part, and the first middle core part is connected with the first cover part and disposed between the first lateral core part and the second lateral core part, wherein the second magnetic core comprises a second cover part (yoke), a third lateral core part (third outer leg), a fourth lateral core part (fourth outer leg) and a second middle core part (second middle leg), the second cover part is spatially corresponding in position to the first cover part, the third lateral core part and the fourth lateral core part are connected with two opposite sides of the second cover part, the third lateral core part is connected with the first lateral core part, the fourth lateral core part is connected with the second lateral core part, the second middle core part is connected with the second cover part and disposed between the third lateral core part and the fourth lateral core part, and the second middle core part is connected with the first middle core part, wherein the first middle core part and the second middle core part penetrates through the first circuit board hole, the second circuit board hole and the bobbin channel (Imada, paras. [0028]-[0029]). Allowable Subject Matter Claims 4 and 5 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. The following is a statement of reasons for the indication of allowable subject matter: Claim 4 recites, inter alia, the first receiving portion is connected with one side of the first lateral wall of the bobbin main body, the first receiving portion and the bobbin channel are staggered with each other, so that the first receiving portion is not covered on the bobbin channel, and the first receiving portion comprises a first concave having a first slot, wherein the second receiving portion is connected with one side of the second lateral wall of the bobbin main body, the second receiving portion and the bobbin channel are staggered with each other, so that the second receiving portion is not covered on the bobbin channel, and the second receiving portion comprises a second concave having a second slot. Claim 5 depends on claim 4. The references of record do not teach or suggest the aforementioned limitations, nor would it be obvious to modify those references to include such limitations. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MANGTIN LIAN whose telephone number is (571)270-5729. The examiner can normally be reached Monday-Friday 0800-1700. 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 S. Ismail can be reached at 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. /MANG TIN BIK LIAN/ Primary Examiner, Art Unit 2837
Read full office action

Prosecution Timeline

Nov 17, 2022
Application Filed
Oct 01, 2025
Non-Final Rejection mailed — §103
Dec 15, 2025
Response Filed
Feb 05, 2026
Final Rejection mailed — §103
Apr 23, 2026
Request for Continued Examination
Apr 28, 2026
Response after Non-Final Action
May 12, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
70%
Grant Probability
97%
With Interview (+26.4%)
2y 7m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1330 resolved cases by this examiner. Grant probability derived from career allowance rate.

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