Prosecution Insights
Last updated: April 19, 2026
Application No. 18/632,288

METHOD AND SYSTEM FOR PRODUCING REFINED HYDROCARBONS FROM WASTE PLASTICS

Non-Final OA §112§DP
Filed
Apr 11, 2024
Examiner
CAMPANELL, FRANCIS C
Art Unit
1771
Tech Center
1700 — Chemical & Materials Engineering
Assignee
SK Geo Centric Co. Ltd.
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
2y 11m
To Grant
82%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allow Rate
635 granted / 871 resolved
+7.9% vs TC avg
Moderate +9% lift
Without
With
+9.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
23 currently pending
Career history
894
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
59.2%
+19.2% vs TC avg
§102
11.0%
-29.0% vs TC avg
§112
20.1%
-19.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 871 resolved cases

Office Action

§112 §DP
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 . Double Patenting Claims 1-20 rejected on the ground of nonstatutory double patenting as being unpatentable over claim1-20 of U.S. Patent No.12139676 B1. Although the claims at issue are not identical, they are not patentably distinct from each other because most of the claim limitations are required except for isomerizing. Isomerizing is in the specification. Applicant is reminded that those portions of the specification which provide support for the patent claims may also be examined and considered when addressing the issue of whether a claim in an application defines an obvious variation of an invention claimed 1n the patent. In re Vogel, 422 F. 2d 438, 164 USPQ 619, 622 (CCPA 1970). Claims 1-20 rejected on the ground of nonstatutory double patenting as being unpatentable over claim1-20 of U.S. Patent No.12365844 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because most of the claim limitations are required except for isomerizing. Isomerizing is in the specification. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-20 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. With regard to claim 1, the claim recites a dehydration operation to "dehydrate the first mixed solution" and then recitation "hydrotreating a second mixed solution obtained by mixing the first mixed solution dehydrated in the dehydration operation... " However, the first mixed solution, after being dehydrated in the dehydration operation, no longer would have the same composition as the original first mixed solution. Thus, it is unclear what is being hydrotreated in the hydrotreating step, because the dehydrating step would produce at least an aqueous stream and a hydrocarbon containing stream, neither of which would have a similar composition to the original "first mixed stream". For purposes of examination, the instant specification describes removing the water after the dehydration and before the hydrotreating. Thus, it is understood that the stream passed to the hydrotreating is a stream of pyrolysis oil from which moisture has been removed, as described in the dehydration step. The Examiner suggests that giving this stream a name, such as "dehydrated stream" or something similar would add clarity in the claims if applied to all claims that reference this stream. Appropriate correction is respectfully requested. This effects all dependent claims. .Allowable Subject Matter There is no allowable subject matter due to double patenting and 112 rejections. No prior art 102/103 rejection is presented. The closest prior art and what is taught and not taught is listed below. Adam et al (WO 2021/204819) teaches a process for pyrolysis of waste plastic. A demulsifier is used in an electric field to treat the stream. This is a dehydration step. The effluent is than hydrotreated. Sulfur compounds, among many others, may be used in the hydrotreating. Isomerization of the refined pyrolysis oil is not taught or suggested. A Hot filter is not used or suggested. A recycle loop connected to a hot filter is not taught or suggested. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to FRANK C CAMPANELL whose telephone number is (571)270-3165. The examiner can normally be reached Monday-Friday 9:00-5:00. 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, Prem Singh can be reached at 571-272-6381. 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. /FRANCIS C CAMPANELL/ Examiner, Art Unit 1771 /PREM C SINGH/Supervisory Patent Examiner, Art Unit 1771
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Prosecution Timeline

Apr 11, 2024
Application Filed
Mar 28, 2026
Non-Final Rejection — §112, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12583806
ALKYL ALUMINUM CATALYST DEACTIVATION WITH WATER AND SOLIDS REMOVAL VIA FILTRATION
2y 5m to grant Granted Mar 24, 2026
Patent 12577474
PHOSPHORUS MODIFIED UZM-35, METHODS OF PREPARATION, AND METHODS OF USE THEREOF
2y 5m to grant Granted Mar 17, 2026
Patent 12577182
METHOD FOR PRODUCING PROPYLENE
2y 5m to grant Granted Mar 17, 2026
Patent 12559693
HEAT TREATMENT OIL
2y 5m to grant Granted Feb 24, 2026
Patent 12559695
SHOCK ABSORBER LUBRICANT COMPOSITION, SHOCK ABSORBER, AND METHOD FOR ADJUSTING FRICTION CHARACTERISTICS OF SHOCK ABSORBER LUBRICANT
2y 5m to grant Granted Feb 24, 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
73%
Grant Probability
82%
With Interview (+9.4%)
2y 11m
Median Time to Grant
Low
PTA Risk
Based on 871 resolved cases by this examiner. Grant probability derived from career allow rate.

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