Prosecution Insights
Last updated: May 29, 2026
Application No. 17/638,709

SILVER PARTICLES

Final Rejection §102§103
Filed
Feb 25, 2022
Priority
Sep 02, 2019 — JP 2019-159858 +1 more
Examiner
LIANG, ANTHONY M
Art Unit
1734
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Osaka Soda Co. Ltd.
OA Round
2 (Final)
83%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
553 granted / 665 resolved
+18.2% vs TC avg
Moderate +10% lift
Without
With
+9.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
24 currently pending
Career history
700
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
58.4%
+18.4% vs TC avg
§102
3.8%
-36.2% vs TC avg
§112
19.6%
-20.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 665 resolved cases

Office Action

§102 §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 . 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 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. Claim(s) 1-2 and 4 is/are rejected under 35 U.S.C. 103 as being unpatentable over WO2019/013231, as cited in the IDS dated 7/25/2023, wherein Kobori et al. (US 2021/0317342), as cited in the IDS dated 7/25/2023, hereinafter “Kobori,” is used as an English language equivalent, in view of Liang et al. (US 2009/0181165), hereinafter “Liang.” Regarding claims 1 and 2, Kobori teaches an electro-conductive adhesive composition comprising silver particles having an average diameter of 0.8 µm (corresponding to silver particles B) and silver particles having an average diameter of 0.09 µm (90 nm, corresponding to silver particles A), which satisfies a relationship in which the average particle diameter of the silver particles B is 5 to 11 times the average particle diameter of the silver particles A (0.8 µm / 0.09 µm 8.89) (Abstract, [0081]-[0088]). Kobori further teaches wherein the mass ratio of the silver particles corresponding to silver particles A to the silver particles corresponding to silver particles B is 0.75 (see Table 1: Ex. 8), which falls within the instantly claimed range of 1:9 to 9:1. Kobori further teaches that an electro-conductive adhesive composition may further comprise an amine-based curing agent ([0062]), which would necessarily adhere to the silver particles, including the silver particles having an average diameter of 0.09 µm corresponding to the instant silver particles A. Kobori teaches that the amine-based curing agent such as tertiary amines, akylureas, and imidazole may be used. Kobori does not specify that the alkylamine may be used as the amine-based curing agent. However, Liang teaches that alkyl amines and imidazoles are both suitable for use as curing agents ([0043]). Therefore, it would have been obvious to one of ordinary skill in the art at the time the invention as filed to substitute the imidazole of Kobori with an alkyl amine, with a reasonable expectation of success, as imidazoles and alkyl amines are art recognized equivalents for the same purpose as curing agents, as taught by Liang ([0043]). Regarding claim 4, Kobori modified by Liang teaches wherein its electro-conductive adhesive composition comprises silver particles having an average particle diameter of 10-200 nm (Kobori: [0026]), which overlaps with the claimed range of less than 50 nm. In the case where the claimed ranges “overlap or lie inside ranges disclosed by prior art” a prima facie case of obviousness exists. See MPEP §2144.05. Response to Arguments Applicant’s arguments, see pp. 3-4, filed 7/7/2025, with respect to the rejection(s) of claim(s) 1 under 35 U.S.C. 102(a)(2) and 35 U.S.C. 103 both over WO2019/013231, wherein Kobori (US 2021/0317342) is used as an English language equivalent, have been fully considered and are persuasive in view of the current amendments to the claims. Therefore, the previous rejections have been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of WO2019/013231, wherein Kobori (US 2021/0317342) is used as an English language equivalent, and Liang (2009/0181165), as detailed above. Applicant’s arguments, see p.4, filed 7/7/2025, with respect to the previous nonstatutory double patenting rejection of claims 1-4 have been fully considered and are persuasive in view of the current amendments to the claims. Therefore, the previous double patenting rejection of claims 1-4 has been withdrawn. 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 ANTHONY M LIANG whose telephone number is (571)272-0483. The examiner can normally be reached M-F: 9:00am-5:00pm. 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, Jonathan Johnson can be reached at (571)272-1177. 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. /ANTHONY M LIANG/Primary Examiner, Art Unit 1734
Read full office action

Prosecution Timeline

Feb 25, 2022
Application Filed
Apr 07, 2025
Non-Final Rejection mailed — §102, §103
Jul 07, 2025
Response Filed
Oct 22, 2025
Final Rejection mailed — §102, §103
Apr 23, 2026
Response after Non-Final Action

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Prosecution Projections

3-4
Expected OA Rounds
83%
Grant Probability
93%
With Interview (+9.8%)
2y 11m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 665 resolved cases by this examiner. Grant probability derived from career allowance rate.

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