Prosecution Insights
Last updated: April 19, 2026
Application No. 18/021,057

REACTOR, CONVERTER, AND POWER CONVERSION DEVICE

Non-Final OA §103§DP
Filed
Feb 13, 2023
Examiner
HINSON, RONALD
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Sumitomo Electric Industries, Ltd.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
3y 1m
To Grant
88%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
568 granted / 773 resolved
+5.5% vs TC avg
Moderate +14% lift
Without
With
+14.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
31 currently pending
Career history
804
Total Applications
across all art units

Statute-Specific Performance

§103
55.9%
+15.9% vs TC avg
§102
26.3%
-13.7% vs TC avg
§112
16.0%
-24.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 773 resolved cases

Office Action

§103 §DP
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 . Election/Restrictions Applicant's election with traverse of species (figures 1-4 and claims 1-11) in the reply filed on 12/08/25 is acknowledged. The traversal is on the ground(s) that it would not be a serious search burden to search all the claims. This is not found persuasive because the different species recite mutually exclusive characteristics which are not obvious variants of each other based on the current record and would be a serious search burden. .Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claim 1 provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1 and 10 of copending Application No. 18/021073 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because a. Claim 1 of the instant application number 18021057, recites, “a coil: and a magnetic core, the magnetic core including a first core and a second core formed into a 6 shape by being combined in an X direction, the first core including a first end core part, at least a part of a middle core part and at least parts of both side core parts including a first side core part and a second side core part, the second core including a second end core part, a remaining part of the middle core part and remaining parts of the first and second side core parts, the first end core part facing a first end surface of the coil, the second end core part facing a second end surface of the coil, the middle core part being arranged inside the coil, the first and second side core parts being arranged outside the coil to sandwich the middle core part, a relative magnetic permeability of the second core being higher than that of the first core, each of the first and second side core parts of the first core having a tip surface facing the second core, a surface of the second core having facing surfaces facing the tip surfaces, an outer side edge of the facing surface being located inwardly of that of the tip surface in a Y direction and an inner side edge of the facing surface and that of the tip surface being substantially aligned in the Y direction when the magnetic core is viewed from a Z direction, a width in the Y direction of the facing surface being shorter than that of the tip surface, the X direction being a direction along an axial direction of the middle core part, the Y direction being a parallel direction of the middle core part, the first side core part and the second side core part, and the Z direction being a direction orthogonal to both the X direction and the Y direction” and wherein: the outer side edge of the facing surface is located inwardly in the Y direction of the outer side edge of the tip surface, and a width in the Y direction of the facing surface is shorter than a width in the Y direction of the tip surface. (same elements recited in claim 1 and 10 of copending Application No. 18/021073. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claim Rejections - 35 USC § 103 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 (i.e., changing from AIA to pre-AIA ) 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 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. 1 Claims 1-3 and 7-11 are rejected under 35 U.S.C. 103 as being unpatentable over Ono (JP 2011176253) (English translation) in view of Sakita (JP 2010027946)(English translation) and Sun et al. (JP 102956344) (English translation) Regarding claim 1, Ono (figures 1-2 and pages 1-4) discloses a coil (10): and a magnetic core (12), the magnetic core including a first core and a second core formed into a shape by being combined in an X direction (see figure 1), the first core including a first end core part (14), at least a part of a middle core part (15) and at least parts of both side core parts including a first side core part (16) and a second side core part (17), the second core including a second end core part (19), a remaining part of the middle core part (20) and remaining parts of the first and second side core parts (21, 22), the first end core part facing a first end surface of the coil (see figures 1-2), the second end core part facing a second end surface of the coil (see figures 1-2), the middle core part being arranged inside the coil (10) (see figures 1-2), the first and second side core parts being arranged outside the coil to sandwich the middle core part (see figures 1-2), each of the first and second side core parts (16/17) of the first core having a tip surface facing the second core (see figures 1-2), a surface of the second core having facing surfaces facing the tip surfaces (see figures 1-2),an inner side edge of the facing surface and that of the tip surface being substantially aligned in the Y direction when the magnetic core is viewed from a Z direction (see figures 1-2), the X direction being a direction along an axial direction of the middle core part(see figures 1-2), the Y direction being a parallel direction of the middle core part (see figures 1-2), the first side core part and the second side core part, and the Z direction being a direction orthogonal to both the X direction and the Y direction (see figures 1-2). Ono does not expressly disclose an outer side edge of the facing surface being located inwardly of that of the tip surface in a Y direction and a width in the Y direction of the facing surface being shorter than that of the tip surface and a relative magnetic permeability of the second core being higher than that of the first core Sakita (figure 5-2) discloses a teaching an outer side edge of the facing surface being located inwardly of that of the tip surface in a Y direction (see core 51a) and a width in the Y direction of the facing surface being shorter than that of the tip surface. (see core 51a) Sun et al.(figures 1-3 and pages 1-2) discloses teaching wherein a relative magnetic permeability of the second core (12) being higher than that of the first core (11). Accordingly, it would have been obvious to one of ordinary skill in the art before the effective filing date of the applicant claimed invention to design wherein an outer side edge of the facing surface being located inwardly of that of the tip surface in a Y direction and a width in the Y direction of the facing surface being shorter than that of the tip surface as taught by Sakita to the inductive device of Ono so as to allow for a more compact inductive device design; thereby saving valuable time and production cost when making the inductive device. Accordingly, it would have been obvious to one of ordinary skill in the art before the effective filing date of the applicant claimed invention to design a relative magnetic permeability of the second core being higher than that of the first core as taught by Sakita to the inductive device of Ono so that the overall loss of the magnetic element increases and the application frequency is low. Regarding claim 2, Ono (figures 1-2 and pages 1-4) discloses the claimed invention except for wherein the width in the Y direction of the facing surface is 60 % or more and 92 % or less of that of the tip surface. It would have been obvious to one having ordinary skill in the art at the time the invention was made to design wherein the width in the Y direction of the facing surface is 60 % or more and 92 % or less of that of the tip surface, since it has been held that where the general conditions of a claim are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art. In re Aller, 105 USPQ 233. Such as to allow for a more compact inductive device design; thereby saving valuable time and production cost when making the inductive device. Regarding claim 3, Ono (figures 1-2 and pages 1-4) discloses the core can be designed as a compact powder core designing wherein the first core is a compact of a composite material, a soft magnetic powder being dispersed in a resin in the composite material, and the second core is a powder compact made of a raw powder containing a soft magnetic powder would have been an obvious design consideration based on in intended application/environment use. Such as to offer advantages like higher efficiency (lower core/eddy current losses), enabling smaller, lighter, and more powerful motors and transformers, especially at high frequencies Regarding claim 7, Ono (figures 1-2 and pages 1-4) discloses the claimed invention except for wherein {(rixWsi)/( r2xWs2)} satisfies a condition of being 0.1 or more and 1.6 or less, where ri denotes the relative magnetic permeability of the first core, Wsi denotes the width in the Y direction of the tip surface, r2 denotes the relative magnetic permeability of the second core and Ws2 denotes the width in the Y direction of the facing surface. It would have been obvious to one having ordinary skill in the art at the time the invention was made to design wherein {(rixWsi)/( r2xWs2)} satisfies a condition of being 0.1 or more and 1.6 or less, where ri denotes the relative magnetic permeability of the first core, Wsi denotes the width in the Y direction of the tip surface, r2 denotes the relative magnetic permeability of the second core and Ws2 denotes the width in the Y direction of the facing surface, since it has been held that where the general conditions of a claim are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art. In re Aller, 105 USPQ 233. Such as to allow for a more compact inductive device design; thereby saving valuable time and production cost when making the inductive device. Regarding claim 8, Ono (figures 1-2 and pages 1-4) discloses the first core includes each of the first and second side core parts entirely, and the facing surfaces are provided on the second end core part of the second core. Regarding claim 9, Ono (figures 1-2 and pages 1-4) discloses the first core includes a part of each of the first and second side core parts, and the facing surface is provided on the remaining part of each of the first and second side core parts of the second core. Regarding claims 10-11, It has been held that a recitation with respect to the manner in which a claimed apparatus is intended to be employed does not differentiate the claimed apparatus from a prior art apparatus satisfying the claimed structural limitations. Ex parte Masham, 2 USPQ2d 1647 (1987). 2 Claims 4-6 are rejected under 35 U.S.C. 103 as being unpatentable over Ono (JP 2011176253) (English translation) in view of Sakita (JP 2010027946)(English translation) and Sun et al. (JP 102956344) (English translation) in further view of Inaba (US 2017/0154719) Regarding claim 4-5, the modified inducive of Ono discloses all limitations as noted above but does not expressly disclose wherein the relative magnetic permeability of the first core is 5 or more and 50 or less. and wherein the relative magnetic permeability of the second core is 50 or more and 500 or less Inaba (para 0080-0081) discloses wherein the relative magnetic permeability of the first core is 5 or more and 50 or less and wherein the relative magnetic permeability of the second core is 50 or more and 500 or less Accordingly, it would have been obvious to one of ordinary skill in the art before the effective filing date of the applicant claimed invention to design wherein the relative magnetic permeability of the first core is 5 or more and 50 or less. and wherein the relative magnetic permeability of the second core is 50 or more and 500 or less core as taught by Inaba to the inductive device of Ono so that the overall loss of the magnetic element increases and the application frequency is low. Regarding claim 6, the modified inducive of Ono discloses all limitations as noted above but does not expressly disclose wherein a ratio of the relative magnetic permeability of the second core to that of the first core is 1.1 or more and 12 or less. Inaba (para 0080-0081) discloses wherein a ratio of the relative magnetic permeability of the second core to that of the first core is 1.1 or more and 12 or less. (Note: the ranges that inaba provide will allow for the ratio to be met) Accordingly, it would have been obvious to one of ordinary skill in the art before the effective filing date of the applicant claimed invention to design as taught by Inaba to the inductive device of Ono so that the overall loss of the magnetic element increases and the application frequency is low. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to RONALD HINSON whose telephone number is (571)270-7915. The examiner can normally be reached M to F; 8 -5. 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 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. /RONALD HINSON/Primary Examiner, Art Unit 2837
Read full office action

Prosecution Timeline

Feb 13, 2023
Application Filed
Jan 10, 2026
Non-Final Rejection — §103, §DP (current)

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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
88%
With Interview (+14.4%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 773 resolved cases by this examiner. Grant probability derived from career allow rate.

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