Prosecution Insights
Last updated: October 25, 2026
Application No. 18/859,172

SPHERICAL SILVER POWDER, METHOD OF PRODUCING SPHERICAL SILVER POWDER, SPHERICAL SILVER POWDER PRODUCTION APPARATUS, AND CONDUCTIVE PASTE

Non-Final OA §102
Filed
Oct 23, 2024
Priority
Apr 28, 2022 — JP 2022-075431 +1 more
Examiner
NGUYEN, KHANH TUAN
Art Unit
1761
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Dowa Electronics Materials Co., Ltd.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
8m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
807 granted / 1083 resolved
+9.5% vs TC avg
Strong +19% interview lift
Without
With
+18.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
26 currently pending
Career history
1121
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
47.6%
+7.6% vs TC avg
§102
24.4%
-15.6% vs TC avg
§112
19.3%
-20.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1083 resolved cases

Office Action

§102
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 . Response to Amendment The preliminary amendment filed on 06/24/2025 is entered and acknowledged by the Examiner. Claims 1, 4, 10, and 13 have been amended. Claims 1-14 are currently pending in the instant application. Election/Restrictions Applicant’s election without traverse of Group I, drawn to claims 1-5 and 13-14, in the reply filed on 08/20/2026 is acknowledged. Claims 6-12 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 08/20/2026. Priority This application is a 371 of PCT/JP2023/016355 (filed on 04/25/2023). Acknowledgment is made of applicant’s claim for foreign priority based on an application filed in Japan on 04/28/2022. Information Disclosure Statement The information disclosure statements (IDS) filed on 10/23/2024, 01/10/2025, and 06/23/2026 are in compliance with the provisions of 37 CFR 1.97 and have been considered by the examiner. An initialed copy accompanies this Office Action. Drawings The drawings filed on 10/23/2024 have been considered. 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. Claims 1-5 and 13-14 are rejected under 35 U.S.C. 102(a)(2) as being anticipated by US 20220055941 A1 (hereinafter Yoon). Initially, it should be noted that the Yoon reference is cited in the IDS filed on 10/23/2024 and as an “X” reference in the international search report filed on 06/23/2026. Regarding claims 1-5, Yoon discloses (See Table 2, Comparative Example 1) a silver powder A having a D10 of 1.002 um, a D50 of 1.576 um, a D90 of 2.62 um, and ratio [D90-D10]/D50 of 0.99. The ratio [D90-D10]/D50 of Yoon is less than 1.0. Yoon further discloses (See Table 2, Comparative Example 1) that the silver powder A having a specific surface area (BET) of 0.428 m2/g and a true specific gravity of 10.2 g/cm3. Applicant described the D diameter DBET is calculated by the formula DBET = 6/(SSA)/true density where SSA is BET specific surface area (See [0011] of the present specification). According to Applicant’s formula, Yoon discloses DBET = 6/(0.428)/10.2 = 1.374 um. Moreover, the ratio of D50/DBET of Yoon is 1.576/1.374 = 1.147. Regarding claims 13-14, Yoon discloses a conductive paste useful in solar cell (See [0014]) comprises an organic vehicle including a binder resin and an organic solvent (See [0139]). The reference specifically or inherently meets each of the claimed limitations in their broadest interpretations. The reference is anticipatory. In view of the foregoing, the above claims have failed to patentably distinguish over the applied art. 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 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KHANH TUAN NGUYEN whose telephone number is (571)272-8082. The examiner can normally be reached M-F 9:00 AM to 5:00 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 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. /KHANH T NGUYEN/Primary Examiner, Art Unit 1761
Read full office action

Prosecution Timeline

Oct 23, 2024
Application Filed
Sep 30, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12772725
BLOCK CONJUGATED POLYMER MATERIAL AND ACTIVE LAYER MATERIAL AND ORGANIC OPTOELECTRONIC DEVICE USING THE SAME
3y 2m to grant Granted Oct 20, 2026
Patent 12767838
INK COMPOSITION, LAYER USING SAME, AND ELECTROPHORESIS DEVICE AND DISPLAY DEVICE COMPRISING SAME
3y 1m to grant Granted Oct 20, 2026
Patent 12770873
Sodium Nickelate Cathode Material Synthesis Utilizing Persulfate Desodiation and Oxidation and Uses Thereof
3y 6m to grant Granted Oct 20, 2026
Patent 12767535
Novel Process of Synthesizing Cathode Material
2y 10m to grant Granted Oct 20, 2026
Patent 12759885
COW HAIR-BASED POROUS BIOCHAR, SYNTHESIS PROCESS FOR OBTAINING SAID BIOCHAR, COW HAIR-BASED COMPOSITE ACTIVE MATERIAL, POSITIVE ELECTRODE COMPRISING SAID COMPOSITE ACTIVE MATERIAL, AND METHOD FOR PREPARING SAID POSITIVE ELECTRODE
2y 4m to grant Granted Oct 13, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
74%
Grant Probability
93%
With Interview (+18.7%)
2y 8m (~8m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1083 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month