Prosecution Insights
Last updated: May 29, 2026
Application No. 18/266,099

BORON NITRIDE POWDER, HEAT DISSIPATION SHEET, AND METHOD FOR PRODUCING HEAT DISSIPATION SHEET

Non-Final OA §103§DOUBLEPATENT
Filed
Jun 08, 2023
Priority
Jan 06, 2021 — JP 2021-000881 +1 more
Examiner
WALKER, AJA ARYANNA
Art Unit
1761
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Denka Company Limited
OA Round
1 (Non-Final)
100%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 100% — above average
100%
Career Allowance Rate
2 granted / 2 resolved
+35.0% vs TC avg
Minimal +0% lift
Without
With
+0.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
16 currently pending
Career history
21
Total Applications
across all art units

Statute-Specific Performance

§103
64.5%
+24.5% vs TC avg
§102
9.7%
-30.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 2 resolved cases

Office Action

§103 §DOUBLEPATENT
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 . Information Disclosure Statement Receipt is acknowledged of the Information Disclosure Statement filed July 7, 2023, 16 April 2024, 13 June 2024, and 12 July 2024. The Examiner has considered the reference cited therein to the extent that each is a proper citation. Please see the attached USPTO Form. Election/Restrictions Applicant’s election of Group II (claim 6) without traverse in the reply filed on 24 March 2026 is acknowledged. Claims 1-5 and 7 are withdrawn from consideration from further consideration pursuant to 37 CFR 1.142(b), as being withdrawn to a non-elected invention, and non-elected species of the invention, there being no allowable generic or linking claims. Claim 6 is under examination and the requirement for restriction is made final. Claim Rejections - 35 USC § 103 The following is a quotation of pre-AIA 35 U.S.C. 103(a) which forms the basis for all obviousness rejections set forth in this Office action: (a) A patent may not be obtained through the invention is not identically disclosed or described as set forth in section 102, if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under pre-AIA 35 U.S.C. 103(a) are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims under pre-AIA 35 U.S.C. 103(a), the examiner presumes that the subject matter of the various claims was commonly owned at the time any inventions covered therein were made absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and invention dates of each claim that was not commonly owned at the time a later invention was made in order for the examiner to consider the applicability of pre-AIA 35 U.S.C. 103(c) and potential pre-AIA 35 U.S.C. 102(e), (f) or (g) prior art under pre-AIA 35 U.S.C. 103(a). Claim 6 is rejected under 35 U.S.C. 103(a) as being unpatentable over Fukasawa (US 20200216738 A1). With regard to claim 6, Fukasawa teaches a heat dissipation sheet by forming and curing the composition (para 0169); wherein the composition comprises a hexagonal boron nitride powder (hBN hereinafter) and a resin (Abstract). Fukasawa further teaches the hBN powder comprises an aggregate of primary particles of hBN (para 0014); wherein the particles have a peak A of 0.1 to 20 μm, peak B of 20 to 200 μm, and peak C of 45 to 150 μm (paras 0014 and 0016), thereby overlapping the claimed maximum points (peaks). Fukasawa further teaches that peak A, B, C are gradually larger than one another (Table 2, Examples 1-3, after treatment). Fukasawa does not teach the claimed heat dissipation sheet to the degree of specificity as to be anticipatory. However, it would have been obvious to one of ordinary skill in the art before the effective filling date of the invention to have selected the overlapping portion of the ranges disclosed by the reference because selection of overlapping portion of ranges has been held to be a prima facie case of obviousness. See MPEP §2144.05(I). Therefore, the invention as a whole would be obvious to a person of ordinary skill in the art. 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 6 provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 4-10 of copending Application No. 18/271129 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because of the following reasons listed below. It is clear that all the elements of the US 18/266099 claim (6) are to be found in US 18/271129 claims 4-10. US 18/266099 claims a boron nitride powder comprising aggregated hexagonal boron nitride particles, resin, and heat dissipation sheet. US 18/266099 claims overlap in boron nitride particle properties, resin, and use thereof as the instant claims. The difference between the instant claims lies in the fact that ‘129 claims includes more elements such as, a silane coupling agent and properties of the silane to boron nitride particles and is thus much more specific. A person of ordinary skill in the art would conclude that the invention described in the instant claims would have been an obvious variation. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Aja A Walker whose telephone number is (571)272-0037. The examiner can normally be reached Monday - Friday 7-5. 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, Angela Brown-Pettigrew can be reached at 571-272-2817. 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. /A.A.W./Examiner, Art Unit 1761 /ANGELA C BROWN-PETTIGREW/Supervisory Patent Examiner, Art Unit 1761
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Prosecution Timeline

Jun 08, 2023
Application Filed
Apr 20, 2026
Non-Final Rejection mailed — §103, §DOUBLEPATENT (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12565608
THERMALLY CONDUCTIVE RESIN COMPOSITION
3y 0m to grant Granted Mar 03, 2026
Study what changed to get past this examiner. Based on 1 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
100%
Grant Probability
99%
With Interview (+0.0%)
3y 0m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 2 resolved cases by this examiner. Grant probability derived from career allowance rate.

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