Prosecution Insights
Last updated: August 14, 2026
Application No. 18/416,677

Lead-free Ballistic Modifier for Rocket Motor Propellants

Final Rejection §103
Filed
Jan 18, 2024
Examiner
FELTON, AILEEN BAKER
Art Unit
1734
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Usa AS Represented By Secretary Of The Army
OA Round
2 (Final)
52%
Grant Probability
Moderate
3-4
OA Rounds
1y 10m
Est. Remaining
69%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allowance Rate
229 granted / 444 resolved
-13.4% vs TC avg
Strong +18% interview lift
Without
With
+17.7%
Interview Lift
resolved cases with interview
Typical timeline
4y 5m
Avg Prosecution
45 currently pending
Career history
495
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
64.6%
+24.6% vs TC avg
§102
16.0%
-24.0% vs TC avg
§112
16.9%
-23.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 444 resolved cases

Office Action

§103
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 . Election/Restrictions Applicant’s election of invention and species in the reply is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). Claims 4, 7, and 9 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected species, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 1/21/2026. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1-3, 5, 6, 8, and 10-12 are rejected under 35 U.S.C. 103 as being unpatentable over Bondinaux (NO 122959). Regarding claims 1-3, 5, 6, 8, and 10-12, Bondinaux discloses a double based rocket propellant that is made by mixing the following ingredients nitrocellulose, nitroglycerin (0031), cerium oxide (meets burning rate modifier (0015), diethylene glycol dinitrate (meets energetic plasticizer and polyhydric alcohol) (0031), propyl adipate (meets inert plasticizer and simple ester) (0034), nitrodiphenylamine (meets stabilizer) (0034), and copper salts such as copper salicylate or copper resorcylate (0034). It would have been obvious to one having ordinary skill in the art at the time the invention was made and/or filed to use multiple additives that are taught by Bondinaux since Bondinaux teaches that they are known to be used with a rocket propellant that includes nitrocellulose and nitroglycerin (double base). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to AILEEN BAKER FELTON whose telephone number is (571)272-6875. The examiner can normally be reached Monday 9-5:30, Thursday 11-3, Friday 9-5:30. 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, Jonathan Johnson can be reached at 571-272-1177. 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. /AILEEN B FELTON/Primary Examiner, Art Unit 1734
Read full office action

Prosecution Timeline

Jan 18, 2024
Application Filed
Dec 08, 2025
Response after Non-Final Action
Apr 01, 2026
Non-Final Rejection mailed — §103
May 11, 2026
Response Filed
Aug 11, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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7y 2m to grant Granted Jun 09, 2026
Patent 12631434
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5y 7m to grant Granted May 19, 2026
Patent 12617738
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4y 2m to grant Granted May 05, 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
52%
Grant Probability
69%
With Interview (+17.7%)
4y 5m (~1y 10m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 444 resolved cases by this examiner. Grant probability derived from career allowance rate.

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