Prosecution Insights
Last updated: May 29, 2026
Application No. 18/690,892

REDUCING PARTICLE DISPERSION

Final Rejection §103
Filed
Mar 11, 2024
Priority
Sep 24, 2021 — JP 2021-155390 +2 more
Examiner
NGUYEN, KHANH TUAN
Art Unit
1761
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Mitsubishi Pencil Company Limited
OA Round
2 (Final)
74%
Grant Probability
Favorable
3-4
OA Rounds
6m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
793 granted / 1064 resolved
+9.5% vs TC avg
Strong +18% interview lift
Without
With
+18.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
19 currently pending
Career history
1091
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
75.3%
+35.3% vs TC avg
§102
14.0%
-26.0% vs TC avg
§112
8.1%
-31.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1064 resolved cases

Office Action

§103
DETAILED ACTION Final 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 amendment filed on 03/13/2026 is entered and acknowledged by the Examiner. Claims 1-15 have been amended. New claims 16-20 have been added. Claims 1-20 are currently pending in the instant application. The rejection of claims 1, 3, and 5 under 35 U.S.C. 102(a)(1) as being anticipated by the article to Zhang is maintained. The rejection of claims 2, 4, 6, 8, 9, and 11-15 under 35 U.S.C. 103 as being unpatentable over the article to Zhang in view of (Hisato) Haga (JP 2018193531 A) is maintained. The rejection of claim 7 under 35 U.S.C. 103 as being unpatentable over the article to Zhang in view of Zhong (WO 2012006959 A1) is maintained. The rejection of claim 10 under 35 U.S.C. 103 as being unpatentable over the article to Zhang in view of Vic (US 2006/0078522 A1) is maintained. Response to Arguments Applicant's arguments filed on 03/13/2026 have been fully considered but they are not persuasive. The amendment to include the feature of “an aqueous ink composition” in the preamble of the claims are noted. Applicant main argument is Zhang does not disclose the feature of an aqueous ink. In response to applicant's arguments, the recitation of “an aqueous ink composition” is not been given patentable weight because the recitation occurs in the preamble. A preamble is generally not accorded any patentable weight where it merely recites the purpose of a process or the intended use of a structure, and where the body of the claim does not depend on the preamble for completeness but, instead, the process steps or structural limitations are able to stand alone. See In re Hirao, 535 F.2d 67, 190 USPQ 15 (CCPA 1976) and Kropa v. Robie, 187 F.2d 150, 152, 88 USPQ 478, 481 (CCPA 1951). Moreover, the claiming of a new use, new function or unknown property which is inherently present in the prior art does not necessarily make the claim patentable, In re Best, 562 F.2d 1252,1254,195 USPQ 430,433 (CCPA 1977). See also MPEP 2112 I. Based on this rationale, the rejection over Zhang is maintained. Claim Rejections - 35 USC § 103 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 2, 4, 6, 8, 9, and 11-17 are rejected under 35 U.S.C. 103 as being unpatentable over the article to Zhang in view of Haga (JP 2018193531 A). Claims 2, 4, 6, 8, 9, and 11-15 are rejected for the reasons of record. Regarding claims 16 and 17, Haga discloses an antioxidant including tannic acid (See [0008] and [0025]). The tannic acid of Haga fulfills the claimed preservative component. Claims 10 and 18-20 are rejected under 35 U.S.C. 103 as being unpatentable over the article to Zhang in view of Vic (JP 2018193531 A). Claims 10 is rejected for the reasons of record. Regarding claims 18-20, Vic discloses a cyanoacrylate monomer having a formula (II) with group -COXR’3 with X including O and R’3 is C1 to C10 carbon atoms (See [0061] and [0069]). The R’3 of C2 to C10 carbon atoms fulfills the instant claimed R group. 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 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 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

Mar 11, 2024
Application Filed
Jan 07, 2026
Non-Final Rejection mailed — §103
Mar 13, 2026
Response Filed
May 20, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12637553
ELECTRICALLY CONDUCTIVE COMPOSITION, SHEET-FORM FLEXIBLE ELECTRODE USING SAME, AND METHOD FOR PRODUCING SAID ELECTRODE
3y 1m to grant Granted May 26, 2026
Patent 12640369
LITHIUM NICKEL-BASED COMPOSITE OXIDE AS A POSITIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM-ION BATTERIES
2y 6m to grant Granted May 26, 2026
Patent 12624265
ANTISTATIC AGENT, ANTISTATIC COMPOSITION COMPRISING SAME, ANTISTATIC RESIN COMPOSITION COMPRISING SAME, AND MOLDED ARTICLE THEREOF
4y 7m to grant Granted May 12, 2026
Patent 12609310
IMPURITY REMOVAL FROM AN INTERMEDIATE PRODUCT OBTAINED FROM Ca/Na/Li HYPOCHLORITE DELITHIATION PROCESS
2y 4m to grant Granted Apr 21, 2026
Patent 12598700
WIRING BOARD
1y 6m to grant Granted Apr 07, 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

3-4
Expected OA Rounds
74%
Grant Probability
93%
With Interview (+18.5%)
2y 8m (~6m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1064 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