Prosecution Insights
Last updated: July 17, 2026
Application No. 18/554,082

BRANCHED OLEFIN POLYMER, PREPARATION METHOD THEREFOR AND USE THEREOF

Non-Final OA §112
Filed
Oct 05, 2023
Priority
Apr 29, 2021 — CN 202110478113.2 +1 more
Examiner
NGUYEN, HA S
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
OA Round
1 (Non-Final)
58%
Grant Probability
Moderate
1-2
OA Rounds
4m
Est. Remaining
36%
With Interview

Examiner Intelligence

Grants 58% of resolved cases
58%
Career Allowance Rate
358 granted / 617 resolved
-7.0% vs TC avg
Minimal -22% lift
Without
With
+-21.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
31 currently pending
Career history
654
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
78.1%
+38.1% vs TC avg
§102
12.4%
-27.6% vs TC avg
§112
6.1%
-33.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 617 resolved cases

Office Action

§112
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 . Election/Restriction Applicant’s election of Group III: Claims 10 and 14, in the reply filed on 06/17/2026 is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). Claims 10 and 14 are directed to an allowable product. Pursuant to the procedures set forth in MPEP § 821.04(b), Claims 1-3 and 12, directed to a similar allowable product, previously withdrawn from consideration as a result of a restriction requirement, are hereby rejoined and fully examined for patentability under 37 CFR 1.104. Claims 4-9 and 13 are directed to the invention(s) of a method of preparing a branched olefin polymer which does NOT require all the limitations of an allowable product claim, and have NOT been rejoined. Because a claimed invention previously withdrawn from consideration under 37 CFR 1.142 has been rejoined, the restriction requirement among groups I and III as set forth in the Office action mailed on 04/20/2026 is hereby withdrawn. In view of the withdrawal of the restriction requirement as to the rejoined inventions, applicant(s) are advised that if any claim presented in a divisional application is anticipated by, or includes all the limitations of, a claim that is allowable in the present application, such claim may be subject to provisional statutory and/or nonstatutory double patenting rejections over the claims of the instant application. Once the restriction requirement is withdrawn, the provisions of 35 U.S.C. 121 are no longer applicable. See In re Ziegler, 443 F.2d 1211, 1215, 170 USPQ 129, 131-32 (CCPA 1971). See also MPEP § 804.01. Allowable Subject Matter Claims 1-3, 10 and 14, are allowed. If it is the Applicant desires for the application to go to allowance, it is suggested that the withdrawn claims 4-9 and 13 be canceled. If it is the Applicant desires for the withdrawn claims to be rejoined in the allowance, it is suggested that claims 4-9 and 13 be rewritten to include all the limitations of one of the allowed claims of either claim 1 and/or claim 10 and rewritten to overcome the possible rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, and/or 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph. (i.e. indefinite with “preferably” in the claims and failure to limit formulas (I) in claim 4 since formulas (II) and (IV) appear to be different/unrelated formulas, but depend from claim 4). The following is an examiner’s statement of reasons for allowance: The first closest prior art is Wang et al., “Living polymerization of higher 2-alkene with a-diimine nickel catalysts: Synthesis and characterization of high molecular weight poly(2-alkene)s,” Polymer, vol. 127 pp. 88-100 (2017), as cited by the Applicant in IDS mail dated 12/11/2023, which teaches the polymerization of 2-pentene, 2-hexene and/or 2-octene to form a polymer with 54-92 methyl groups per 1000C (Table 5), and a Tg of -71 to -65 deg C and no melting points. (page 99 and Table 5). Wang does not teach the claimed Mw/Mn distribution and melting point ranges. The second closest prior art is Wang et al., “Chain-Walking Polymerization of Linear Internal Octenes Catalyzed by α-Diimine Nickel Complexes,” Organometallics, vol. 37, pp. 1358-1367 (2018), as cited by the Applicant in IDS mail dated 12/11/2023, which teaches the polymerization of 2-octene, 3-octene and 4-octene to form a polymer with 119-125 methyl groups per 1000C (Table 1), and a Tg of –70 to -64.4 deg C and no melting points. (page 1364). Wang does not teach the claimed Mw/Mn distribution and melting point ranges. The third closest prior art is Wang et al., “Chain-walking polymerization of 3-heptene with phenyl substituted α-diimine nickel catalysts,” Polymer, vol. 181, 121801, pp. 1-10, (2019), which teaches the polymerization of 3-heptene to form a polymer with 49-88 methyl groups per 1000C (Table 2), and a Tg of –70 to -65 deg C and no melting points. (Table 2 and page 6). Wang does not teach the claimed Mw/Mn distribution and melting point ranges. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to HA S NGUYEN whose telephone number is (571)270-7395. The examiner can normally be reached Mon-Fri, Flex schedule 7:30am-4:00pm. 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, Randy Gulakowski can be reached at (571)272-1302. 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. /HA S NGUYEN/Primary Examiner, Art Unit 1766
Read full office action

Prosecution Timeline

Oct 05, 2023
Application Filed
Jun 30, 2026
Non-Final Rejection mailed — §112 (current)

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

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Prosecution Projections

1-2
Expected OA Rounds
58%
Grant Probability
36%
With Interview (-21.7%)
3y 2m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 617 resolved cases by this examiner. Grant probability derived from career allowance rate.

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