Prosecution Insights
Last updated: July 17, 2026
Application No. 17/910,553

POLYURETHANE COMPOSITIONS AND ELASTOMERS THEREFROM

Non-Final OA §112
Filed
Sep 29, 2023
Priority
Mar 10, 2020 — provisional 62/987,625 +1 more
Examiner
WOODWARD, ANA LUCRECIA
Art Unit
1765
Tech Center
1700 — Chemical & Materials Engineering
Assignee
National Research Council of Canada
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
90%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
902 granted / 1235 resolved
+8.0% vs TC avg
Strong +17% interview lift
Without
With
+16.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
40 currently pending
Career history
1265
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
63.2%
+23.2% vs TC avg
§102
1.9%
-38.1% vs TC avg
§112
12.3%
-27.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1235 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/Restrictions 2. Applicant's traversal of the restriction requirement filed on June 08, 2026 is persuasive and, as such, the restriction requirement has been withdrawn. Claim Rejections - 35 USC § 112 3. Claims 1-9, 15, 18-20, 22, 23, 25 and 38-41 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, line 10, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 1, line 14, it is unclear how the “a second polyol with hydroxyl groups” distinguishes over the antecedently-recited “first diol” or “second diol”. In claim 1, the conditions under which the recited properties were determined are not apparent. In claim 2, line 5, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 3, there is no express antecedent basis for the “second isocyanate-terminated” prepolymer. In claim 4, line 7, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 5, line 6, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 7, line 4, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 15, lines 3, 5 and 7, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 20, line 2, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 25, the language “second chain extender” is indefinite in that there is no express antecedent for a “first chain extender”. In claim 25, line 4, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 38, line 10, “or mixtures thereof” is redundant to the antecedently-recited “at least one”. In claim 38, given the “at least one” (line 2), it is unclear whether the surface modifier comprises both a fluorinated polymer and a silicone polymer, as opposed to at least one thereof. In claim 39, “PTMEG” is not defined. In claim 39, the term “Desmodur N3800”, which is a trade name or a mark used in commerce, is not accompanied by the generic terminology. Although the use of trade names and marks used in commerce (i.e., trademarks, service marks, certification marks, and collective marks) are permissible in patent applications, the proprietary nature of the marks should be respected and every effort made to prevent their use in any manner which might adversely affect their validity as commercial marks. In claim 40, given that “about 0” includes zero, it is unclear whether the presence of the surface modifier is required. Allowable Subject Matter 4. The prior art of record neither anticipates nor renders obvious a polyurethane composition governed by all the presently claimed features. US 2019/0367667 (Aoki), the closest prior art of record, discloses a polyurethane elastomer composition comprising (i) an isocyanate-terminated prepolymer component obtained from 1,4-bis(isocyanatomethyl) cyclohexane (A1) and a polyetherdiol (A2) and (ii) a polyol component comprising a macropolyol (B1) and two low molecular weight alkane diols (B2) (e.g., Tables 1-3). Aoki, however, is silent regarding the NCO/OH molar ratio governing the polyurethane composition or mechanical strength/tensile set properties of the resultant cured polyurethane composition. Thus, Aoki fails to disclose, suggest or provide any motivation to arrive at the presently claimed subject matter. Conclusion 5. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Ana L Woodward whose telephone number is (571)272-1082. The examiner can normally be reached M-F 8am-5pm. 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, Heidi Kelley can be reached at 571-270-1831. 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. /ANA L. WOODWARD/Primary Examiner, Art Unit 1765
Read full office action

Prosecution Timeline

Sep 29, 2023
Application Filed
Jun 06, 2023
Response after Non-Final Action
Jun 24, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12679967
THERMOPLASTIC RESIN COMPOSITION
3y 2m to grant Granted Jul 14, 2026
Patent 12679973
PREPARATION METHOD OF BRANCHED POLYAMIDE (PA) COPOLYMER WITH ULTRA-HIGH TOUGHNESS, PA COPOLYMER PREPARED USING THE METHOD, AND USE OF THE PA COPOLYMER
3y 4m to grant Granted Jul 14, 2026
Patent 12668696
THERMOPLASTIC RESIN AND OPTICAL MEMBER INCLUDING SAME
3y 2m to grant Granted Jun 30, 2026
Patent 12662588
COMPOSITION INCLUDING CHLOROPRENE POLYMER, MOLDED BODY, AND METHOD FOR PRODUCING MOLDED BODY
3y 11m to grant Granted Jun 23, 2026
Patent 12662561
METHODS FOR PRODUCING BIMODAL POLYOLEFINS AND IMPACT COPOLYMERS
3y 11m to grant Granted Jun 23, 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

1-2
Expected OA Rounds
73%
Grant Probability
90%
With Interview (+16.8%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1235 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