Prosecution Insights
Last updated: August 06, 2026
Application No. 18/615,770

VERTICAL TAKEOFF AND LANDING AIRCRAFT SURFACE TENSION COMPENSATION SYSTEM

Non-Final OA §102§112
Filed
Mar 25, 2024
Priority
Jun 16, 2022 — continuation of 11/939,054
Examiner
NGUYEN, STEVEN VU
Art Unit
3668
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Hazelaero
OA Round
2 (Non-Final)
78%
Grant Probability
Favorable
2-3
OA Rounds
3m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allowance Rate
135 granted / 173 resolved
+26.0% vs TC avg
Moderate +8% lift
Without
With
+7.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
24 currently pending
Career history
194
Total Applications
across all art units

Statute-Specific Performance

§101
13.7%
-26.3% vs TC avg
§103
46.3%
+6.3% vs TC avg
§102
16.8%
-23.2% vs TC avg
§112
19.7%
-20.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 173 resolved cases

Office Action

§102 §112
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 . Status of Claims The Examiner acknowledges that the current application is a continuation (CON) of the parent application 17842458, which has an effective filing date of 06/16/2022. Response to Arguments The Office Action mailed on April 14, 2026, is withdrawn because it was based on claims filed on March 25, 2024, rather than the claims currently under examination. A new ground of rejection is set forth herein based on the Preliminary Amendment filed on January 12, 2026. 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 21 – 40 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. Claim 21, line 10 – 15 recite “determine, based on sensor data generated by the sensor system, a surface- interaction condition affecting vertical movement of the aircraft chassis relative to the environment; and control the propulsion system to modulate thrust generated by at least one of the plurality of independently controllable propulsion units based on the surface-interaction condition.” The claim recites determining “a surface-interaction condition affecting vertical movement of the aircraft chassis relative to the environment” based on sensor data and “control the propulsion system based on the surface-interaction condition”. However, the specification is narrowly limited to measuring and compensating for “surface tension” of a fluid surface using dedicated surface tension sensors (e.g., QELS systems applying Lamb’s equation) and calculating a corresponding reaction force. See paragraphs [0005], [0017]–[0018], [0022]–[0023], [0026]–[0034], and the associated figures. The broader term “surface-interaction condition” is not used or described in the specification and encompasses subject matter (e.g., other types of surface interactions) for which the disclosure provides neither a representative number of species nor a disclosure of common structural or functional features. Consequently, the specification does not demonstrate that the inventor was in possession of the full scope of the claimed subject matter at the time of filing. Applicant is required to amend the claims to recite only the subject matter that is adequately supported by the original disclosure. Claims 22 – 39 are dependent from claim 21 and are rejected for the same basis as claim 21 above. Claim 40 recites a method with substantially similar scope as claim 21, thus being rejected for the same basis as claim 21 above. Note: No prior art rejection under 102 or 103 is made at this time because the rejection of claims 21 – 40 under 112a set forth above must first be resolved. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to STEVEN V NGUYEN whose telephone number is (571)272-7320. The examiner can normally be reached Monday -Friday 11am - 7pm 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, James J Lee can be reached at (571) 270-5965. 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. /STEVEN VU NGUYEN/Primary Examiner, Art Unit 3668
Read full office action

Prosecution Timeline

Mar 25, 2024
Application Filed
Jan 12, 2026
Response after Non-Final Action
Jan 14, 2026
Non-Final Rejection mailed — §102, §112
Apr 14, 2026
Response Filed
Jun 26, 2026
Non-Final Rejection mailed — §102, §112 (current)

Precedent Cases

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

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Prosecution Projections

2-3
Expected OA Rounds
78%
Grant Probability
86%
With Interview (+7.7%)
2y 8m (~3m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 173 resolved cases by this examiner. Grant probability derived from career allowance rate.

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