Prosecution Insights
Last updated: July 17, 2026
Application No. 18/829,763

CMAS-Protective Coating Infiltrants

Non-Final OA §112
Filed
Sep 10, 2024
Priority
Sep 11, 2023 — provisional 63/537,796
Examiner
PENNY, TABATHA L
Art Unit
1712
Tech Center
1700 — Chemical & Materials Engineering
Assignee
RTX Corporation
OA Round
1 (Non-Final)
46%
Grant Probability
Moderate
1-2
OA Rounds
2y 2m
Est. Remaining
68%
With Interview

Examiner Intelligence

Grants 46% of resolved cases
46%
Career Allowance Rate
262 granted / 576 resolved
-19.5% vs TC avg
Strong +22% interview lift
Without
With
+22.5%
Interview Lift
resolved cases with interview
Typical timeline
4y 0m
Avg Prosecution
27 currently pending
Career history
604
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
89.9%
+49.9% vs TC avg
§102
1.7%
-38.3% vs TC avg
§112
5.8%
-34.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 576 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 . Election/Restrictions Claim 17 is withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 3/30/2026. 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 15 is 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. Claim 15 recites the limitation "the melting" in line 2. There is insufficient antecedent basis for this limitation in the claim. For the purpose of examination, the claim will be treated as depending from Claim 2. Allowable Subject Matter Claims 1-14, 16, and 18-20 are allowed. Claim 15 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: The closest prior art is Keshavan (US 20200173033) and Landwehr (US 20190284673). Keshavan teaches a method for protecting a coated substrate having a porous ceramic barrier coating (abstract), the method comprising: applying a nitrate salt to the ceramic barrier coating ([0026]); infiltrating the salt into porosity of the ceramic barrier coating ([0026]); decomposing the infiltrated solution into solid oxide particles by heating ([0028]). Landwehr teaches infiltration under vacuum ([0160-0161]). The prior art does not teach or suggest a method as claimed of infiltrating a molten acetate and/or nitrate salt, solidifying the infiltrated molten salt, and sintering the solidified salt. The prior art does not teach or suggest sintering the solidified salt so as to oxidize and liberate carbon and/or nitrogen. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TABATHA L PENNY whose telephone number is (571)270-5512. The examiner can normally be reached M-F 8:00-5:00. 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, Michael Cleveland can be reached at 5712721418. 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. /TABATHA L PENNY/Primary Examiner, Art Unit 1712
Read full office action

Prosecution Timeline

Sep 10, 2024
Application Filed
May 26, 2026
Non-Final Rejection mailed — §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

1-2
Expected OA Rounds
46%
Grant Probability
68%
With Interview (+22.5%)
4y 0m (~2y 2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 576 resolved cases by this examiner. Grant probability derived from career allowance rate.

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