Prosecution Insights
Last updated: May 29, 2026
Application No. 18/051,342

DYNAMIC COVALENT POLYMERIZATIONS WITH ELEMENTAL SULFUR AND SULFUR PREPOLYMERS

Final Rejection §102§103
Filed
Oct 31, 2022
Priority
Aug 11, 2011 — provisional 61/574,903 +30 more
Examiner
FANG, SHANE
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Arizona Board of Regents
OA Round
3 (Final)
76%
Grant Probability
Favorable
4-5
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
1141 granted / 1497 resolved
+11.2% vs TC avg
Strong +19% interview lift
Without
With
+18.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
55 currently pending
Career history
1545
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
73.0%
+33.0% vs TC avg
§102
14.6%
-25.4% vs TC avg
§112
5.2%
-34.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1497 resolved cases

Office Action

§102 §103
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 . DETAILED ACTION A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant’s submission filed on 3/31/26 has been entered. Response to Amendment The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. The amendment, which merely combines previously field claim 5 with claim 1, is supported. The previous restriction and 102/103 rejections have been maintained and repeated. Claim Rejections - 35 USC § 102 Claim(s) 1-4, 6-12, and 16 is(are) rejected under 35 U.S.C. 102(a)(1) as being anticipated by Denton et al. (WO2015123552, machine translation provided). As to claims 1-4, 6-12, and 16, Denton (claims, abs., figures, examples, 122-124) discloses the claimed radical polymerization process of producing a sulfur copolymer comprising melting sulfur (50 wt%) at 180 °C (enables thermal activation of scission of dynamic S-S bond and forming sulfur radicals) with addition of propylenedioxythiophenes (40wt%) (would inherently form a prepolymer) followed by further heating at 180 °C of the prepolymer (would inherently enables thermal activation of scission of dynamic S-S bond and forming sulfur radicals in the molten prepolymer) with further addition of 1 ,3-diisopropenyl benzene (10 wt%, enables branching): PNG media_image1.png 200 400 media_image1.png Greyscale Denton teaches a process of making and raw materials that are indistinguishable from the instant process recited in claims 1-4, 6-12, and 16. In light of this, it appears that the adduct would have inherently possessed the claimed properties such as tunability, enabled miscibility, solubility., thiol-ene or other related process, improved processability, etc.. See MPEP § 2112. Regarding the amendment of claim 1, the disclosed two temperatures, both at 180 °C, meet the claimed first and second temperatures. It is duly notified the claimed first and second temperatures can be identical, e.g., 140 ° C, recited in instant claims 13 and 16. Claim Rejections - 35 USC § 103 Claim(s) 13 is (are) rejected under 35 U.S.C. 103 as being unpatentable over Denton et al. (WO2015123552, machine translation provided). Disclosure of Denton is adequately set forth in ¶1 and is incorporated herein by reference. As to claim 13, the sulfur can be heated at 120 to 230 °C (claims 117-119) for copolymerization, overlapping with the claimed range. It has been found that where claimed ranges overlap ranges disclosed by the prior art, a prima facie case of obviousness exists - see MPEP 2144.05. Response to Arguments The argument for allowance of amended claims has been fully considered but not persuasive. Applicant’s attack (7-8) on Denton for not teaching the claimed adding the second comonomer to the molten sulfur prepolymer appears erroneous, because Denton teaches further heating at 180 °C of the prepolymer before adding 1,3-diisopropenyl benzene. The heating temperature (180 °C) meets the claimed range (second temperature) of instant claim 16, so the heating condition would inherently enable thermal activation of scission of dynamic S-S bond and forming sulfur radicals in the molten prepolymer. Denton teaches a process of making and raw materials that are indistinguishable from the instant process recited in claims 1-4, 6-12, and 16. In light of this, it appears that the heating condition would inherently enable thermal activation of scission of dynamic S-S bond and forming sulfur radicals in the molten prepolymer. See MPEP § 2112. Since the PTO does not have proper means to conduct experiments, the burden of proof is now shifted to applicants to show otherwise. A case indicating that the burden of proof can be shifted to the applicant to show that the subject matter of the prior art does not possess the characteristic relied on whether the rejection is based on inherency under 35 U.S.C. 102 or obviousness under 35 U.S.C. 103. See MPEP § 2184. In re Fitzgerald, 619 F.2d 67, 205 USPQ 594 (CCPA 1980). Applicant’s attack (8-9) on Denton for not teaching the claimed two step polymerization appears erroneous, because Denton teaches the claimed two step polymerizations. Denton (claims, abs., figures, examples, 122-124) discloses the claimed radical polymerization process of producing a sulfur copolymer comprising melting sulfur (50 wt%) at 180 °C (enables thermal activation of scission of dynamic S-S bond and forming sulfur radicals) with addition of propylenedioxythiophenes (40wt%) (would inherently form a prepolymer, first step) followed by further heating 180 °C of the prepolymer (would inherently enables thermal activation of scission of dynamic S-S bond and forming sulfur radicals) with further addition of 1 ,3-diisopropenyl benzene (10 wt%, enables branching, second step). Applicant's argument (9-10) of unexpected results to rebut the previous 102 rejections of claims 1-4, 6-12, and 16 appears erroneous and irrelevant, because arguing unexpected results cannot overcome 102 rejections. Regarding claim 13, applicant's argument (9-10) of unexpected results is unpersuasive and insufficient. Evidence of unexpected results must be factually supported by an appropriate affidavit of declaration. See MPEP § 716.01(c). Unexpected results must, in actuality, be unexpected. Unexpected results must be compared with the closest art, in this particular case, Denton. Unexpected results must be commensurate in scope with the claims. The applicant must show unexpected results over the entire claimed range to support unexpected results for the entire range and generic structures. Therefore, Applicant should compare several compositions containing claimed components of A, B, and C in amounts at several data points over the claimed range to several compositions containing the same claimed components of A, B, and C in amounts at several data points outside of the claimed range, including data points close to and far from the claimed range. Furthermore, the argument cannot overcome the 102 rejections. Therefore, the previous restriction and 102/103 rejections have been maintained and repeated. See above rejections. This is an RCE of applicant’s earlier Application. All claims are drawn to the same invention claimed in the earlier application and could have been finally rejected on the grounds and art of record in the next Office action if they had been entered in the earlier application. Accordingly, THIS ACTION IS MADE FINAL even though it is a first action in this case. See MPEP §706.07(b). 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 mailing date of this final action. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SHANE FANG whose telephone number is (571)270-7378. The examiner can normally be reached on Mon-Thurs. 8am-6pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Randy Gulakowski can be reached on 571.572.1302. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /SHANE FANG/Primary Examiner, Art Unit 1766
Read full office action

Prosecution Timeline

Oct 31, 2022
Application Filed
Sep 08, 2025
Non-Final Rejection mailed — §102, §103
Nov 21, 2025
Response Filed
Jan 13, 2026
Final Rejection mailed — §102, §103
Mar 31, 2026
Request for Continued Examination
Apr 03, 2026
Response after Non-Final Action
Apr 16, 2026
Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12636247
COSMETIC
3y 6m to grant Granted May 26, 2026
Patent 12617900
A POLYMERIZATION METHOD FOR SULFATE ESTER (AMINE) TYPE LINKER POLYMER
5y 6m to grant Granted May 05, 2026
Patent 12617897
A METHOD FOR PREPARING MULTI-COMPONENT POLYMERS THROUGH POST-POLYMERIZATION MODIFICATION
3y 0m to grant Granted May 05, 2026
Patent 12617899
ELECTRICALLY CONDUCTIVE ELASTOMER AND METHOD OF SYNTHESIZING THE SAME
3y 6m to grant Granted May 05, 2026
Patent 12606675
SULFUR-CONTAINING POLYMER, METHOD FOR PRODUCING SAME, AND SULFUR-CONTAINING POLYMER COMPOSITION
3y 1m to grant Granted Apr 21, 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

4-5
Expected OA Rounds
76%
Grant Probability
95%
With Interview (+18.9%)
2y 5m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1497 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