Prosecution Insights
Last updated: April 19, 2026
Application No. 18/629,942

METHOD AND SYSTEM FOR PRODUCING REFINED HYDROCARBONS FROM WASTE PLASTICS

Non-Final OA §DP
Filed
Apr 09, 2024
Examiner
TOOMER, CEPHIA D
Art Unit
1771
Tech Center
1700 — Chemical & Materials Engineering
Assignee
SK Geo Centric Co. Ltd.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
2y 11m
To Grant
76%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
999 granted / 1348 resolved
+9.1% vs TC avg
Minimal +2% lift
Without
With
+2.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
43 currently pending
Career history
1391
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
46.3%
+6.3% vs TC avg
§102
8.0%
-32.0% vs TC avg
§112
28.0%
-12.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1348 resolved cases

Office Action

§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 . Election/Restrictions Applicant’s election without traverse of Group I, claims 1-12 in the reply filed on February 10, 2026 is acknowledged. Claims 13-15 are withdrawn from further consideration. Specification The specification has not been checked to the extent necessary to determine the presence of all possible minor errors. Applicant’s cooperation is requested in correcting any errors of which applicant may become aware in the specification. 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 1-12 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-10 of U.S. Patent No. 12,152,200. Although the claims at issue are not identical, they are not patentably distinct from each other because while the distillation step occurs in the independent claim of the patent, this step occurs in a dependent claim in the present invention. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. US 20150080624 (Gephart) teaches process and apparatus for producing hydrocarbon oil from the thermal decomposition of waste plastics in a continuous process which comprises melting of a waste plastic feedstock into an auger assisted melt reactor to remove chlorine and organics contained in the waste plastic, and transferring the melted waste plastic into a heated screw pyrolysis reactor which includes a transitional metal heat transfer medium. WO2014040634 (Schaaf) teaches plastic waste containing 80 wt.% polymer or mixture of polymers comprising polymethyl (meth)acrylate, polypropylene, polyethylene, polystyrene, polyethylene terephthalate and/or polytetrafluoroethylene, is heated to a temperature at which they are flowable. The flowable plastics are pyrolyzed together with a catalyst and/or an adsorber and the resulting gases are withdrawn. The withdrawn gases are condensed. Neither Gephart nor Schaaf teach or suggest the process wherein the use of a hot filter or secondary pyrolysis occurs. Any inquiry concerning this communication or earlier communications from the examiner should be directed to CEPHIA D TOOMER whose telephone number is (571)272-1126. The examiner can normally be reached Monday-Friday. 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, Prem Singh can be reached at 571-272-6368. 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. /CEPHIA D TOOMER/Primary Examiner, Art Unit 1771 18629942/20260305
Read full office action

Prosecution Timeline

Apr 09, 2024
Application Filed
Mar 06, 2026
Non-Final Rejection — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12600915
HIGH-QUALITY COKE PRODUCTS
2y 5m to grant Granted Apr 14, 2026
Patent 12600914
METHOD OF TREATING WASTE PLASTIC
2y 5m to grant Granted Apr 14, 2026
Patent 12595324
ETHYLENE COPOLYMERS AND USE AS VISCOSITY MODIFIERS
2y 5m to grant Granted Apr 07, 2026
Patent 12577487
HIGH-CARBON BIOGENIC REAGENTS AND USES THEREOF
2y 5m to grant Granted Mar 17, 2026
Patent 12577498
FABRIC CARE FORMULATION
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

1-2
Expected OA Rounds
74%
Grant Probability
76%
With Interview (+2.3%)
2y 11m
Median Time to Grant
Low
PTA Risk
Based on 1348 resolved cases by this examiner. Grant probability derived from career allow rate.

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