Prosecution Insights
Last updated: October 01, 2026
Application No. 18/500,883

WEAK BASE ANION RESIN POLYMERS COMPRISING ALKYLAMINE SEGMENTS AND CROSS-LINKING SEGMENTS, AND THEIR METHODS OF USE IN ION EXCHANGE

Final Rejection §102
Filed
Nov 02, 2023
Priority
Nov 03, 2022 — provisional 63/422,330
Examiner
HEINCER, LIAM J
Art Unit
Tech Center
Assignee
Xerox Corporation
OA Round
2 (Final)
56%
Grant Probability
Moderate
3-4
OA Rounds
2m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 56% of resolved cases
56%
Career Allowance Rate
804 granted / 1442 resolved
-4.2% vs TC avg
Strong +26% interview lift
Without
With
+26.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
65 currently pending
Career history
1512
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
50.8%
+10.8% vs TC avg
§102
20.6%
-19.4% vs TC avg
§112
15.2%
-24.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1442 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 . 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)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 1-6 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ito et al. (EP 585898). Considering Claims 1 and 4: Ito et al. teaches a weak base anion resin (5:51-57) comprising alkylamine segments covalently bonded to crosslinking segments (3:17-28) comprising vinyl amine units (3:17-28) that are optionally alkylated to provide methylvinylamine, dimethylvinylamine, or diethylvinylamine (5:21-44); and teaches that the weak base anion resin absorbs organic acids (6:33-41). Considering Claim 2: Ito et al. teaches the copolymer as being prepared from vinylamine and divinylbenzene (3:17-28). Considering Claim 3: Ito et al. teaches the polymer as comprising a di(meth)acrylate (3:18-28). Considering Claim 5: Ito et al. teaches the copolymer as being prepared from vinylamine and divinylbenzene (3:17-28) and teaches that the weak base anion resin absorbs organic acids (6:33-41). Considering Claim 6: Ito et al. teaches the copolymer as being prepared from vinylamine and divinylbenzene (3:17-28) and teaches the polymer as comprising a di(meth)acrylate (3:18-28) and teaches that the weak base anion resin absorbs organic acids (6:33-41). Claims 1-6 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Tbal et al. (Reactive Polymers 17, 1992, 207-217). Considering Claims 1-6: Tbal et al. teaches a resin comprising vinylamine segments covalently linked to a crosslinking agent that is divinylbenzene and/or ethylene glycol dimethacrylate (Abstract, Table 1), and teaches the resin as absorbing Cu(II), Pb(II), or Cd(II) (Table 3). Response to Arguments Applicant's arguments filed July 13, 2026 have been fully considered but they are not persuasive, because: A) The applicant’s argument that Ito et al. does not teach the claimed alkylamine segments is not persuasive. Ito et al. Ito et al. teaches a weak base anion resin (5:51-57) comprising alkylamine segments covalently bonded to crosslinking segments (3:17-28) comprising vinyl amine units (3:17-28) that are optionally alkylated to provide methylvinylamine, dimethylvinylamine, or diethylvinylamine (5:21-44). Ito et al. teaches that the anion consists essentially of “a vinyl amine and divinylbenzene” (3:17-28), and thus explicitly teaches the claimed species. The examples show the polymers as being prepared from vinylformamide monomers that are then hydrolyzed to form the vinyl amine units claimed. These units are then optionally alkylated to provide methylvinylamine, dimethylvinylamine, or diethylvinylamine (5:21-44). B) The applicant’s argument that Ito only absorbs organic acids, rather than ions, is not persuasive. Organic acids are explicitly claimed as preferred ions for the weak base anion resin (Claim 4). C) The applicant’s argument that Tbal et al. only teaches vinyl amine and not other species is not persuasive. A genus does not always anticipate a claim to a species within the genus. However, when the species is clearly named, the species claim is anticipated no matter how many other species are additionally named. See Ex parte A, 17 USPQ2d 1716 (Bd. Pat. App. & Inter. 1990). See MPEP § 2131.02. D) The applicant’s argument that chelating and absorption are different is not persuasive. During prosecution, claim terms are given there broadest reasonable interpretation consistent with the original specification. Tbal et al. teaches that the metal ions are attached to the amine functional groups of the resin, result in a resin with ions attached to the polymer beads (pg. 214). This reads on the broadest reasonable interpretation of absorbance, as the ions are removed from the liquid and attached to the polymer. Conclusion THIS ACTION IS MADE FINAL. 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. Correspondence Any inquiry concerning this communication or earlier communications from the examiner should be directed to LIAM J HEINCER whose telephone number is (571)270-3297. The examiner can normally be reached M-F 7:30-5:00. 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, Mark Eashoo can be reached at 571-272-1197. 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. /LIAM J HEINCER/Primary Examiner, Art Unit 1767
Read full office action

Prosecution Timeline

Nov 02, 2023
Application Filed
May 11, 2026
Non-Final Rejection mailed — §102
Jul 13, 2026
Response Filed
Sep 17, 2026
Final Rejection mailed — §102 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
56%
Grant Probability
82%
With Interview (+26.0%)
3y 1m (~2m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1442 resolved cases by this examiner. Grant probability derived from career allowance rate.

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