Prosecution Insights
Last updated: July 17, 2026
Application No. 18/339,377

PFAS-FREE THERMOPLASTIC MULTILAYER FUEL LINE

Final Rejection §112
Filed
Jun 22, 2023
Examiner
LU, HAOTIAN
Art Unit
3753
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
GM Global Technology Operations LLC
OA Round
2 (Final)
54%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
92%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allowance Rate
14 granted / 26 resolved
-16.2% vs TC avg
Strong +38% interview lift
Without
With
+38.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
27 currently pending
Career history
57
Total Applications
across all art units

Statute-Specific Performance

§103
91.6%
+51.6% vs TC avg
§102
1.5%
-38.5% vs TC avg
§112
6.9%
-33.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 26 resolved cases

Office Action

§112
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 . Response to Arguments Applicant’s arguments with respect to claims 1-20 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. 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. Claim 21 and 25 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. The term “about” in claim 21 and 25 is a relative term which renders the claim indefinite. The term “about” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. The term “about” is defined in the specification paragraph 0054 to be from less than or equal to 5% variation to less than or equal to 0.1% variation, thus it is unclear what amount of variation is disclosed in the claimed invention. For purposes of compact prosecution the term will be omitted. Allowable Subject Matter Claims 1-3,5,6, 9-17,19,22-24 allowed. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Sadr (US 6170535 B1) discloses a multilayered EVOH and polyamide fuel pipe. THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to HAOTIAN LU whose telephone number is (571)272-0444. The examiner can normally be reached Monday-Friday 8:00 am-5:00 pm EST. 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, Kenneth Rinehart, can be reached at (571) 272-4881. 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. /H.L./Examiner, Art Unit 3753 /KENNETH RINEHART/Supervisory Patent Examiner, Art Unit 3753
Read full office action

Prosecution Timeline

Jun 22, 2023
Application Filed
Jan 28, 2026
Non-Final Rejection mailed — §112
Mar 20, 2026
Interview Requested
Mar 26, 2026
Applicant Interview (Telephonic)
Mar 26, 2026
Examiner Interview Summary
Apr 01, 2026
Response Filed
Jun 18, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12674537
HOSE STOP
3y 7m to grant Granted Jul 07, 2026
Patent 12669210
SYSTEMS AND METHODS FOR LINING A PIPE WITH A LIGHTED LINER OR BLADDER
3y 4m to grant Granted Jun 30, 2026
Patent 12655925
BLOCKING DEVICE AND METHOD
3y 0m to grant Granted Jun 16, 2026
Patent 12624775
TUBE
3y 5m to grant Granted May 12, 2026
Patent 12624789
THERMALLY INSULATED TRANSFER LINE
3y 2m to grant Granted May 12, 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
54%
Grant Probability
92%
With Interview (+38.3%)
3y 0m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 26 resolved cases by this examiner. Grant probability derived from career allowance rate.

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