Prosecution Insights
Last updated: April 19, 2026
Application No. 18/664,728

MUZZLE ATTACHMENT WITH LOCKING MECHANISM

Final Rejection §102§112
Filed
May 15, 2024
Examiner
TILLMAN, JR, REGINALD S
Art Unit
3641
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Sig Sauer Inc.
OA Round
2 (Final)
78%
Grant Probability
Favorable
3-4
OA Rounds
2y 0m
To Grant
89%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allow Rate
1065 granted / 1367 resolved
+25.9% vs TC avg
Moderate +11% lift
Without
With
+11.0%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 0m
Avg Prosecution
33 currently pending
Career history
1400
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
32.1%
-7.9% vs TC avg
§102
39.1%
-0.9% vs TC avg
§112
20.9%
-19.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1367 resolved cases

Office Action

§102 §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 . 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. Claims 1-9 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 1 recites the limitation "the muzzle adapter" in line 14. There is insufficient antecedent basis for this limitation in the claim. Claim 1 recites the limitation "the compensator body" in line 2. There is insufficient antecedent basis for this limitation in the claim. In light of the above, the claims will be examined on the merits as best understood. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1 and 6-9 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Jager (US 10,337,820). Jager (Fig 2A) discloses a muzzle attachment for a firearm, comprising: an attachment body (4) defining a projectile passage therethrough along a longitudinal axis, the projectile passage having a proximal end portion sized to receive a distal end portion of a barrel of the firearm, and further defining a fastener opening (Fig 2B, 13) extending to the proximal end portion of the projectile passage; and a locking assembly (7) operable to tighten the attachment body to the barrel when the barrel is received in the proximal end portion of the projectile passage, the locking assembly comprising: a threaded fastener (17) in the fastener opening; and a yoke (see below) having a curved portion in the proximal end portion of the projectile passage; wherein, when the distal end portion of the barrel is received in the proximal end portion of the projectile passage, advancing the fastener moves the yoke into contact with the barrel to tighten the attachment to the muzzle adapter. PNG media_image1.png 418 562 media_image1.png Greyscale Allowable Subject Matter Claims 2-5 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. Claims 10-21 allowed. Response to Arguments Applicant's arguments filed 1-30-26 have been fully considered but they are not persuasive. Applicant argues that the examiner’s reference to Jager (US 10,337,820) does not disclose at least claim 1; the examiner disagrees (see rejection above). Conclusion 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 REGINALD S TILLMAN, JR whose telephone number is (571)270-7010. The examiner can normally be reached M-F 830-530. 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, Troy Chambers can be reached at 571-272-6874. 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. /REGINALD S TILLMAN, JR/Primary Examiner, Art Unit 3641
Read full office action

Prosecution Timeline

May 15, 2024
Application Filed
Oct 28, 2025
Non-Final Rejection — §102, §112
Jan 30, 2026
Response Filed
Feb 04, 2026
Final Rejection — §102, §112 (current)

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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
78%
Grant Probability
89%
With Interview (+11.0%)
2y 0m
Median Time to Grant
Moderate
PTA Risk
Based on 1367 resolved cases by this examiner. Grant probability derived from career allow rate.

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