Prosecution Insights
Last updated: May 29, 2026
Application No. 18/577,293

BIODEGRADABLE POLYMER BASED BIOCOMPOSITES

Non-Final OA §DOUBLEPATENT§DP
Filed
Jan 08, 2024
Priority
Jul 07, 2021 — provisional 63/219,344 +1 more
Examiner
DONAHUE, OLGA LUCIA
Art Unit
1763
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Ctk Research And Development Canada Ltd.
OA Round
3 (Non-Final)
76%
Grant Probability
Favorable
3-4
OA Rounds
10m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
85 granted / 112 resolved
+10.9% vs TC avg
Moderate +12% lift
Without
With
+12.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
31 currently pending
Career history
144
Total Applications
across all art units

Statute-Specific Performance

§103
85.7%
+45.7% vs TC avg
§102
2.8%
-37.2% vs TC avg
§112
1.6%
-38.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 112 resolved cases

Office Action

§DOUBLEPATENT §DP
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 . Continued Examination Under 37 CFR 1.114 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and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114.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 4/07/2026 has been entered. Response to Amendment This office action is in response to the Amendment filed on 4/07/2026. Claim 18 has been cancelled. Claims 1-7, 9-11, 24-26 and 28 have been withdrawn with traverse in the reply filed on May 13/2025. Claims 1-7, 9-11, 13-17, 19, 21-26 and 28 are pending in this application. The objection of claim 13 set forth in the Office Action dated 10/08/2025 are WITHDRAWN due to Applicant's responsive amendments. The rejections of the claims under 35 USC 102 and 35 USC 103 over Pulikkalparambil et al. in the Office Action dated 10/08/2025 are WITHDRAWN due to Applicant's responsive amendments and arguments. The double patenting rejections of claims 13, 18 and 22 over claims 15, 22 and 26 of copending Application No. 18/699,343 are MAINTAINED. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 13 and 22 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 15, 22 and 26 of copending Application No. 18/699,343 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because claim 15 of the copending application teach a biocomposite comprising a blend or mixture of 30-99.5 wt.% of PBAT, 0.5-60 wt. % of hemp residue with all the features of instant claim 13 and optionally 0.1-50 wt.% of PBAT grafted with a compatibilizer, wherein the content of hemp residue overlap with the content of hemp of instant claim 13 and both claim sets teach the mixture is heated. Additionally, Claims 22 and 26 of the copending application recite all the limitations of instant claims 13 and 22, including the hemp residue particle dimensions and the processing agent. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter Claim 14-17, 19, 21 and 23 are objected to as being dependent upon a rejected base claim (NSDP of claim 13). Claim 13 would be allowable after the double patenting rejection is addressed. The following is a statement of reasons for indication of allowable subject matter of claim 13: Regarding claim 13, Pulikkalparambil et al. (AIMS Materials Science, 4(3): 814-831, 2017) teach a biocomposite comprising poly(butylene adipate-co-terephthalate (PBAT) and different percentages of hemp or Si-hemp fiber (abstract and introduction, figure 1). Pulikkalparambil et al. further teach a content of the hemp fibers of 2%, 5% 10% and 20% (paragraph 2.3, Fig.3), 0.05-1 wt.% of carbon nanofibers and 50-200 ppm of Ag-Nps. Additionally, Pulikkalparambil et al. teach the fibers are grinded and sieved using an 80 mesh sieve (numeral 2.2, p.816). Pulikkalparambil et al. teach the diameter of the untreated fiber is 40 µm and the treated fiber is 30 µm (numeral 3.1, p.818, Fig. d, e, p.819). However, Pulikkalparambil et al. do not teach or fairly suggest the biocomposite comprising a combination of PBAT and a hemp residue comprising, in particular hemp hurd and optionally bast fibers, wherein the hemp residue comprises particles having a specific combination of length, width and aspect ratio as recited in the instant claim. It is noted that the composition of the hemp hurd is different than the composition of the hemp fibers. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to OLGA L. DONAHUE whose telephone number is (571)270-1152. The examiner can normally be reached M-F 8:00-5:00. 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, JOSEPH DEL SOLE can be reached at 571-272-1130. 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. /OLGA LUCIA DONAHUE/Examiner, Art Unit 1763 /CATHERINE S BRANCH/Primary Examiner, Art Unit 1763
Read full office action

Prosecution Timeline

Jan 08, 2024
Application Filed
Jun 11, 2025
Non-Final Rejection mailed — §DOUBLEPATENT, §DP
Sep 11, 2025
Response Filed
Oct 08, 2025
Final Rejection mailed — §DOUBLEPATENT, §DP
Apr 07, 2026
Request for Continued Examination
Apr 09, 2026
Response after Non-Final Action
May 13, 2026
Non-Final Rejection mailed — §DOUBLEPATENT, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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LASER PRINTABLE POLYMERIC COMPOSITIONS
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Patent 12584019
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3y 5m to grant Granted Mar 24, 2026
Patent 12577389
THERMOPLASTIC MOULDING MATERIALS WITH IMPROVED PROPERTY PROFILE
3y 8m to grant Granted Mar 17, 2026
Patent 12577379
NBR COMPOSITION AND BUFFER MATERIAL USING THE SAME
3y 5m to grant Granted Mar 17, 2026
Patent 12570840
FLAME-RETARDANT RESIN COMPOSITION, FLAME-RETARDANT RESIN HOUSING, AND ELECTRONIC DEVICE
3y 8m to grant Granted Mar 10, 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
88%
With Interview (+12.2%)
3y 3m (~10m remaining)
Median Time to Grant
High
PTA Risk
Based on 112 resolved cases by this examiner. Grant probability derived from career allowance rate.

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