Prosecution Insights
Last updated: October 04, 2026
Application No. 18/644,365

FUEL INJECTOR OF AN INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE

Non-Final OA §112
Filed
Apr 24, 2024
Priority
Apr 26, 2023 — DE 10 2023 110 724.0
Examiner
MO, XIAO EN
Art Unit
3747
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
MAN Energy Solutions SE
OA Round
4 (Non-Final)
81%
Grant Probability
Favorable
4-5
OA Rounds
0m
Est. Remaining
87%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
299 granted / 371 resolved
+10.6% vs TC avg
Moderate +6% lift
Without
With
+6.1%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
12 currently pending
Career history
384
Total Applications
across all art units

Statute-Specific Performance

§101
5.8%
-34.2% vs TC avg
§103
42.8%
+2.8% vs TC avg
§102
27.7%
-12.3% vs TC avg
§112
20.6%
-19.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 371 resolved cases

Office Action

§112
DETAILED ACTION This Office Action is in response to the communication(s) filed on 5/05/2026. 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and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114.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 5/05/2026 has been entered. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-11 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. The newly amended limitation of “wherein the ratio (d1/d2) is selected such that injection of the first liquid fuel produces a pilot fuel spray for igniting the second liquid fuel while maintaining a controlled spatial relationship between the first and second fuel sprays as defined by the concentric circular contours”. There does not appear to be support for this limitation in the specification. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to XIAO EN MO whose telephone number is (571)272-9970. The examiner can normally be reached Monday-Friday 9-5:30 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, Logan Kraft can be reached at 571-270-5065. 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. /XIAO EN MO/Primary Examiner, Art Unit 3747
Read full office action

Prosecution Timeline

Show 4 earlier events
Apr 17, 2025
Response after Non-Final Action
Jun 10, 2025
Non-Final Rejection mailed — §112
Sep 04, 2025
Response Filed
Feb 19, 2026
Final Rejection mailed — §112
Apr 14, 2026
Response after Non-Final Action
May 05, 2026
Request for Continued Examination
May 11, 2026
Response after Non-Final Action
Aug 11, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

4-5
Expected OA Rounds
81%
Grant Probability
87%
With Interview (+6.1%)
2y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 371 resolved cases by this examiner. Grant probability derived from career allowance rate.

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