Prosecution Insights
Last updated: October 02, 2026
Application No. 17/435,847

AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS

Final Rejection §112
Filed
Sep 02, 2021
Priority
Mar 28, 2019 — JP 2019-063278 +1 more
Examiner
BARZACH, JEFFREY EUGENE
Art Unit
1731
Tech Center
1700 — Chemical & Materials Engineering
Assignee
MITSUBISHI PENCIL Company, Limited
OA Round
4 (Final)
57%
Grant Probability
Moderate
5-6
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allowance Rate
84 granted / 147 resolved
-7.9% vs TC avg
Strong +41% interview lift
Without
With
+40.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
53 currently pending
Career history
194
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
53.1%
+13.1% vs TC avg
§102
16.2%
-23.8% vs TC avg
§112
20.2%
-19.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 147 resolved cases

Office Action

§112
DETAILED ACTION Response to Amendments In response to the amendment received on 06/09/2026: • Claims 1-20 are currently pending. 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 Interpretation It is noted that all explicit definitions mentioned in the Non-Final mailed 02/09/2026 are incorporated herein and treated as set forth previously. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-20 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. In claim 1, the term “the acid dye” and “the basic dye” lack antecedent basis. There is no previous mention of an acid dye or a basic dye in the claims. To correct, the Examiner suggests amending the claim as follows: “…colored by a salt-forming dye, which is a salt-forming body of an acid dye and a basic dye, wherein the acrylic resin particle is formed…” For the purposes of examination, the Examiner is interpreting the claim as if it was written like in the above suggestion. Moreover, in claim 20, the term “the salt-forming body” lacks antecedent basis. There is no previous mention of a salt-forming body in the claims. To correct, the Examiner suggests making the same amendment as suggested for claim 1 above. For the purposes of examination, the Examiner is interpreting claim 1 as if it was written like in the above suggestion. Allowable Subject Matter Claims 1-20 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. With respect to independent claim 1, the prior art fails to teach or suggest an aqueous ink composition, comprising: a colored resin particle comprising an acrylic resin particle colored by a salt-forming dye, wherein the acrylic resin particle is formed from a polymer of at least a carboxyl group-containing vinyl monomer having a solubility in water of 10 mass% or less, and an ester monomer of acrylic acid or methacrylic acid and a linear alcohol or a cyclic alcohol having 2 to 18 carbons, and wherein the colored resin particle comprises a reaction product of the carboxyl group-containing vinyl monomer, the ester monomer, the acid dye, and the basic dye. The closest prior art includes Haga (JP-2017002121-a) in view of Shimizu (JP-2016125052-A) and Ogura (JP-2018002860-A). While modified Haga teaches most of the claimed limitations (see Non-Final Rejection dated 02/09/2026 at pg. 3-5), modified Haga fails to explicitly teach the colored resin particle as comprising a reaction product of the carboxyl group-containing vinyl monomer, the ester monomer, the acid dye, and the basic dye. Haga teaches their dye to be mixed with the pre-formed polymer, rather than being polymerized together with the monomer components (see Haga at pg. 3, para. 7-8 and pg. 7, para. 1-4). In other words, there is no teaching or suggestion in Haga to form a reaction product of the claimed components. Moreover, there is no teaching or suggestion to include an acid and a basic dye together during the monomer synthesis, nor a reasonable expectation of success that such a reaction product would suitably function with the claimed monomers in the ink of Haga. Therefore, the claims overcome Haga. Furthermore, Applicant’s Affidavit dated 06/09/2026 demonstrates evidence that a reaction product between the claimed monomers, an acid dye, and a basic dye has distinct structural characteristics relative to a pre-formed salt-forming dye that is mixed with a pre-formed resin emulsion. In other words, in the case that the newly amended claimed limitation regarding the “reaction product” is categorized as a “product-by-process” limitation, Applicant’s Affidavit provides convincing support that the claimed limitation generates a distinct structural difference relative to Haga. To elaborate, in the Affidavit, inventive Example 14 is composed of Acid Yellow 42 and Basic Violet 1, which are polymerized with the claimed monomers to form a reaction product (see Affidavit dated 06/09/2026 at pg. 2-3). By contrast, Comparative Example 16, which is analogous to the ink in Haga, is composed of a pre-formed salt-forming dye (VALIFAST VIOLET 1701, which is a salt-forming dye of Acid Yellow 42 and Basic Violet 1) that is mixed with a pre-formed acrylic resin (see Affidavit dated 06/09/2026 at pg. 3). Inventive Example 14 shows good dispersion and a homogenous ink composition relative to Comparative Example 16, which failed to produce a homogenous ink. Examples 14 and 16 are nearly identical - including the same monomer components and the same concentrations - with the only differences being the differences in the type of dye and its order of addition. Consequently, Applicant’s Affidavit provides evidence that the claimed colored resin particle generates distinct structural features relative to a colored resin particle like that produced by Haga. Additionally, in general, one of ordinary skill in the art would expect a “reaction product” of four separate components to produce a structurally distinct compound relative to a simple mixing of the pre-formed components together. In fact, Haga themselves distinguishes between the two in their background (see Haga at pg. 2, para. 1). Moreover, there is no reasonable expectation of success that salt-forming dyes, when formed as reaction products, would suitably function with the specifically claimed monomers. Consequently, the claims are allowed. 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 extension fee 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 date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Jeffrey E Barzach whose telephone number is (571)272-8735. The examiner can normally be reached Monday - Friday; 8 am - 5 pm. 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, Amber R Orlando can be reached on 571-270-3149. 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. /JEFFREY EUGENE BARZACH/Examiner, Art Unit 1731 /AMBER R ORLANDO/Supervisory Patent Examiner, Art Unit 1731
Read full office action

Prosecution Timeline

Show 5 earlier events
Apr 28, 2025
Final Rejection mailed — §112
Jul 28, 2025
Response after Non-Final Action
Sep 29, 2025
Request for Continued Examination
Oct 02, 2025
Response after Non-Final Action
Feb 09, 2026
Non-Final Rejection mailed — §112
Jun 09, 2026
Response Filed
Jun 09, 2026
Response after Non-Final Action
Sep 09, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12735843
SILVER COMPOSITIONS AND METHODS FOR MAKING BIOCIDAL CURRENCY
5y 1m to grant Granted Sep 15, 2026
Patent 12735591
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Patent 12698404
METHOD FOR PROVIDING AN AQUEOUS COMPOSITION WITH RETROREFLECTIVE PROPERTIES
3y 11m to grant Granted Aug 04, 2026
Patent 12668710
PEELABLE INK COMPOSITION WITH COLOR-CHANGING FOR POROUS SUBSTRATES
3y 9m to grant Granted Jun 30, 2026
Patent 12662603
Ink Jet Ink Composition And Recording Method
4y 3m to grant Granted Jun 23, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
57%
Grant Probability
98%
With Interview (+40.6%)
3y 5m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 147 resolved cases by this examiner. Grant probability derived from career allowance rate.

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