Prosecution Insights
Last updated: April 19, 2026
Application No. 18/387,999

PISTON FLUID FLOW DYNAMICS, TEMPERATURE STABILITY, AND NOISE MITIGATION

Non-Final OA §102
Filed
Nov 08, 2023
Examiner
RODRIGUEZ, PAMELA
Art Unit
3616
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Fox Factory Inc.
OA Round
1 (Non-Final)
88%
Grant Probability
Favorable
1-2
OA Rounds
2y 8m
To Grant
98%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allow Rate
829 granted / 944 resolved
+35.8% vs TC avg
Moderate +10% lift
Without
With
+10.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
34 currently pending
Career history
978
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
42.0%
+2.0% vs TC avg
§102
36.3%
-3.7% vs TC avg
§112
16.9%
-23.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 944 resolved cases

Office Action

§102
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 . Claim Objections Claim 14 is objected to because of the following informalities: in line 5 of the claim, the term “the main damping piston” should read –the damper piston—to be consistent with the previous claim terminology for this element of the invention. Appropriate correction is required. 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) 1-20 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by U.S. Patent No. 3,831,626 to Peddinghaus. Regarding Claim 1, Peddinghaus discloses a fluid redirection system (see Figures 1-4) comprising: a damper piston 9, the damper piston 9 having a plurality of compression ports and a plurality of rebound ports 5-8 (see Figures 1, 3, and 4 and column 3 lines 3-14); and a fluid ramp 13’,13” on a first side of the damper piston 9 (i.e., the portion of the piston on the left side of piston rod 1 in Figures 1-4), the fluid ramp 13’,13” being of a shape that creates an angled exit for fluid exiting the damper piston 9 (see Figures 1-4 and column 3 lines 17-39). Regarding Claim 2, Peddinghaus further discloses that the fluid ramp 13’ consists of a round ramp (see Figure 2 and the rounded end of edge 15). Regarding Claim 3, Peddinghaus further discloses that the fluid ramp 13” consists of a beveled ramp (see Figure 4 and ramp portion 13”). Regarding Claim 4, Peddinghaus further discloses that the fluid ramp 13’ consists of a square ramp (see Figure 1 and the squared edges at element 13’). Regarding Claim 5, Peddinghaus further discloses that the fluid ramp 13’,13” is not present all around the entire edge of the damper piston 9 but rather the locations are based on where fluid flows when exiting the plurality of compression ports and the plurality of rebound ports 5-8 (see Figure 1 and Claim 1 of the reference, wherein groove portions 13’,13” don’t extend across the entire width of piston 9). Regarding Claim 6, Peddinghaus further discloses that the fluid ramp 13’,13” redirects fluid flow to merge more seamlessly with the boundary layer along a wall of a cylinder (as implied from column 1 line 61 – column 2 line 4). Regarding Claim 7, Peddinghaus further discloses a second fluid ramp 13’ on a second side of the damper piston 9 (i.e., the portion of the piston on the right side of piston rod 1 in Figures 1-4), the second fluid ramp 13’ being of a shape that creates an angled exit for fluid exiting the damper piston 9 (see Figures 1-4). Regarding Claim 8, see Claims 1 and 7 above. Regarding Claim 9, see Claim 2 above. Regarding Claim 10, see Claim 3 above. Regarding Claim 11, see Claim 4 above. Regarding Claim 12, see Claim 5 above. Regarding Claim 13, see Claim 6 above. Regarding Claim 14, Peddinghaus discloses a suspension system (see Figures 1-4) having a cylinder, the cylinder comprising a wall (inherently present and housing the piston assembly of the reference), a piston shaft 1, a damper piston 9 coupled to the piston shaft 1 and configured for operation within the cylinder (see Figures 1-4), the damper piston 9 configured to divide the cylinder into a compression side and a rebound side (inherently forming part of the shock assembly of the reference), the damper piston 9 having a plurality of compression ports and rebound ports 5-8 (see Figures 1, 3, and 4 and column 3 lines 3-14), and a fluid ramp 13’,13” on a first side of the damper piston 9 (i.e., the portion of the piston on the left side of piston rod 1 in Figures 1-4), the fluid ramp 13’,13” being of a shape that creates an angled exit for fluid exiting the damper piston 9 (see Figures 1-4 and column 3 lines 17-39). Regarding Claim 15, see Claim 2 above. Regarding Claim 16, see Claim 3 above. Regarding Claim 17, see Claim 4 above. Regarding Claim 18, see Claim 5 above. Regarding Claim 19, see Claim 6 above. Regarding Claim 20, see Claim 7 above. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. U.S. Patent No. 3,199,636 to Bourcier de Carbon, U.S. Patent No. 9,879,777 to Kobayashi et al., and Japanese Patent No. JP 5922948 all disclose fluid redirection systems similar to applicant’s. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PAMELA RODRIGUEZ whose telephone number is (571)272-7122. The examiner can normally be reached Monday - Thursday 7 AM - 5 PM. 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, Robert Siconolfi can be reached at 571-272-7124. 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. PAMELA RODRIGUEZ Primary Examiner Art Unit 3616 /PAMELA RODRIGUEZ/Primary Examiner, Art Unit 3616 01/21/26
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Prosecution Timeline

Nov 08, 2023
Application Filed
Jan 21, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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Patent 12600339
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Patent 12600852
FRICTION MATERIAL AND BRAKE PAD COMPRISING SUCH FRICTION MATERIAL
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Patent 12595831
ELECTROMECHANICAL BRAKE HAVING A GAS-CONTAINING PISTON CHAMBER
2y 5m to grant Granted Apr 07, 2026
Patent 12576824
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2y 5m to grant Granted Mar 17, 2026
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
88%
Grant Probability
98%
With Interview (+10.5%)
2y 8m
Median Time to Grant
Low
PTA Risk
Based on 944 resolved cases by this examiner. Grant probability derived from career allow rate.

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