Prosecution Insights
Last updated: April 19, 2026
Application No. 17/629,193

POLY (ETHYLENE-VINYL ACETATE) COPOLYMER WITH NON-SPECIFIC SPATIAL CONFIGURATION, METHOD FOR ITS PREPARATION AND USE

Final Rejection §102
Filed
Jan 21, 2022
Examiner
FANG, SHANE
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Chemical Innovation Ltd.
OA Round
2 (Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
2y 6m
To Grant
95%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
1136 granted / 1491 resolved
+11.2% vs TC avg
Strong +19% interview lift
Without
With
+19.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
51 currently pending
Career history
1542
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
43.9%
+3.9% vs TC avg
§102
24.3%
-15.7% vs TC avg
§112
16.5%
-23.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1491 resolved cases

Office Action

§102
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 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 previous restriction and 102 rejections have been maintained and repeated. The previous abandonment has been withdrawn. Claim Rejections - 35 USC § 102 Claim(s) 14 and 21 is(are) rejected under 35 U.S.C. 102(a)(1) as being anticipated by Hosoi et al. (US 4116784). Hosoi (claims, abs., EX15-17) discloses two vinyl acetate-grafted polyethylenes having vinyl acetate content of 42.1 wt% and 9.5wt%. The claimed PEVA with a non-specific spatial configuration of the vinyl acetate units relative to the main ethylene chain appears to be a vinyl acetate grafted polyethylene according to the claimed process, not a syndiotactic or atactic (non-isotactic) that may be implied by instant pgpub [0009]. Hosoi is silent on the claimed process of instant claim 14. However, claim(s) 14 and 21 is(are) product-by-process claims that are limited by and defined by the product. Determination of patentability is based on the product itself, not on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process. In re Thorpe, 777 F. 2d 695, 698,277 USPQ 964,966 (Fed. Cir. 1985). See MPEP § 2113. Hosoi’s vinyl acetate-grafted polyethylenes meets the claimed structure and vinyl acetate content (5-45 wt%). Hosoi is silent on the claimed non-specific spatial configuration, tensile strength, impact strength, elongation, density, hardness, melting point, softening point, and compatibility to polyolefin. Hosoi’s vinyl acetate-grafted polyethylenes would inherently exhibit these properties, dupability, and solubility, because in view of the substantially identical composition (in this case, the disclosed grafted copolymer structure and vinyl acetate wt%), it appears that the adduct would have inherently possessed the claimed properties. See MPEP § 2112. Response to Arguments The argument for allowance of amended claims has been fully considered but not persuasive. Applicant’s attack on Hosoi (pg.3-4) and the inherency rationale appears irrelevant, because Hosoi’s two vinyl acetate-grafted polyethylenes having vinyl acetate content of 42.1 wt% and 9.5wt% (as intermediates) used in EX15-17 has been cited for the rejection. The final products of Ex15-17 including dipropargyl maleate have not been cited for the rejection. The examiner asserts Hosoi’s two vinyl acetate-grafted polyethylenes having vinyl acetate content of 42.1 wt% and 9.5wt% meet the claimed one, as evidenced by instant Fig.3. and examples showing the PE backbone with grafted vinyl acetate: PNG media_image1.png 185 837 media_image1.png Greyscale The claimed PEVA with a non-specific spatial configuration of the vinyl acetate units relative to the main ethylene chain appears to be a vinyl acetate grafted polyethylene according to the claimed process, not a syndiotactic or atactic (non-isotactic) that may be implied by instant pgpub [0009]. Furthermore, the examine asserts a prima facie case of inherency has been established, because in view of the substantially identical composition (in this case, the disclosed grafted copolymer structure and vinyl acetate wt%), it appears that the adduct would have inherently possessed the claimed properties. See MPEP § 2112. Therefore, the previous restriction and 102 rejections have been maintained and repeated. 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. 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

Jan 21, 2022
Application Filed
Feb 13, 2025
Non-Final Rejection — §102
Aug 19, 2025
Response after Non-Final Action
Aug 19, 2025
Response Filed
Jan 08, 2026
Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12600818
PROCESS FOR THE PREPARATION OF STERICALLY HINDERED NITROXYL ETHERS
2y 5m to grant Granted Apr 14, 2026
Patent 12595395
KIT-OF-PARTS FOR CURABLE POLYASPARTIC ACID ESTER-BASED COATING COMPOSITIONS
2y 5m to grant Granted Apr 07, 2026
Patent 12595338
PROCESS FOR PREPARING A HYDROXY GROUP FUNCTIONALIZED THIOETHER
2y 5m to grant Granted Apr 07, 2026
Patent 12577411
GAS-BARRIER COATING COMPOSITION AND GAS-BARRIER LAMINATE
2y 5m to grant Granted Mar 17, 2026
Patent 12581846
ELECTROLUMINESCENT POLYMER BASED ON PHENANTHROIMIDAZOLE UNITS, PREPARATION METHOD THEREFOR, AND USE THEREOF
2y 5m to grant Granted Mar 17, 2026
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
76%
Grant Probability
95%
With Interview (+19.0%)
2y 6m
Median Time to Grant
Moderate
PTA Risk
Based on 1491 resolved cases by this examiner. Grant probability derived from career allow rate.

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