Prosecution Insights
Last updated: April 19, 2026
Application No. 19/191,438

PAD PLUNGER

Non-Final OA §102
Filed
Apr 28, 2025
Examiner
ZOLLINGER, NATHAN C
Art Unit
3746
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Tally Production Systems LLC
OA Round
1 (Non-Final)
69%
Grant Probability
Favorable
1-2
OA Rounds
3y 0m
To Grant
99%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allow Rate
590 granted / 851 resolved
-0.7% vs TC avg
Strong +41% interview lift
Without
With
+41.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
37 currently pending
Career history
888
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
48.0%
+8.0% vs TC avg
§102
25.5%
-14.5% vs TC avg
§112
22.3%
-17.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 851 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 . Specification The title of the invention is not descriptive. A new title is required that is clearly indicative of the invention to which the claims are directed. The following title is suggested: PAD PLUNGER WITH PLURALITY OF PADS AND SPRING ARRANGEMENT. 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-24 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Bender (US 6,176,309). Claim 1: Bender discloses a pad plunger (Fig. 1) comprising a body (9); and a plurality of pads (see Figure below) biased to move relative to the body, wherein at least a first one of the plurality of pads is biased to move relative to the body at one rate (as Figure 1 suggests and would be appreciated by a skilled artisan, the multiple pad arrangement in Bender has an upper pad with a single spring providing a single spring stiffness upon the upper pad and the lower pad has a two-spring, parallel arrangement providing a 2-spring stiffness upon the lower pad and therefore a stiffer composite spring system; higher stiffness means the spring will resist deformation more strongly, leading to faster contraction or expansion when a force is applied; Examiner notes that choosing one of the upper or lower pad as the “first one” will provide for a first particular rate that will be different than the other because it is under the influence of either a single or double spring arrangement), and a second one of the plurality of pads is biased to move relative to the body at another rate (continuing the discussion above, choosing the other of the upper or lower pad as the “second one” will provide for a second, different rate based on it operating under the influence of the remaining of a single or double spring arrangement). PNG media_image1.png 610 422 media_image1.png Greyscale Claim 2: Bender further discloses that at least the first one of the plurality of pads or the second one of the plurality of pads is biased by a spring (see Figure above). Claim 3: Bender further discloses that the first one of the plurality of pads is biased by a first spring (note single spring for upper pad) and the second one of the plurality of pads is biased by a second spring (note either one or both of the springs in the lower pad). Claim 4: Bender further discloses that the first spring has a first rate (as can be appreciated from the single spring arrangement) and the second spring (viewed as the dual springs in the lower pad together) has a second rate (as can be appreciated from the double spring arrangement). Claim 5: Bender further discloses that the first rate and the second rate are different (as would be expected between a single and double spring arrangement). Claim 6: Bender further discloses that the first one of the plurality of pads is located toward a top end of the pad plunger (see Figure above). Claim 7: Bender further discloses that the second one of the plurality of pads is located toward a bottom end of the pad plunger (see Figure above). Claim 8: Bender further discloses that the first rate is greater than the second rate (as the upper pad has only one spring and a weaker resistance force, the rate at which the pad inwardly move will be greater than that with respect to the second pad which has a greater resistive force). Claims 9-10: Bender further discloses that the first/second spring has a first end and a second end (note Figure above), where the first end sits in a first pocket in the body and the second end sits in a pocket in the first/second one of the plurality of pads (see Figure above, which represents pocket arrangements in the pads). Claims 11-13: Bender further discloses that the first/second pocket in the body and the pocket in the first/second one of the plurality of pads have a first/second collective depth (see Figure above) which are the same. Claim 14: Bender further discloses that the first spring has a first rate (as can be appreciated from the single spring arrangement) and the second spring (viewed as the dual springs in the lower pad together) has a second rate (as can be appreciated from the double spring arrangement). Claim 15: Bender further discloses that the first rate and the second rate are different (as would be expected between a single and double spring arrangement). Claim 16: Bender further discloses that the first one of the plurality of pads is located toward a top end of the pad plunger (see Figure above). Claim 17: Bender further discloses that the second one of the plurality of pads is located toward a bottom end of the pad plunger (see Figure above). Claim 18: Bender further discloses that the first rate is greater than the second rate (as the upper pad has only one spring and a weaker resistance force, the rate at which the pad inwardly move will be greater than that with respect to the second pad which has a greater resistive force). Claim 19: Bender further discloses that the first collective depth and the second collective depth are different (Examiner noting that only one spring-occupied depth is part of the upper pad while the lower pad has two spring-occupied depths). Claim 20: Bender further discloses that the first collective depth is less than the second collective depth (Examiner noting that only one spring-occupied depth is part of the upper pad while the lower pad has two spring-occupied depths). Claim 21: Bender further discloses that the first spring has a first rate (as can be appreciated from the single spring arrangement in the upper pad) and the second spring (which can viewed as one of the dual springs in the lower pad) has a second rate (as can be appreciated from the single spring arrangement in the lower pad). Claim 22: Bender further discloses that the first rate and the second rate are the same (as can be viewed as the similar single springs in either the upper or lower pad). Claim 23: Bender further discloses that the first one of the plurality of pads is located toward a top end of the pad plunger (see Figure above). Claim 24: Bender further discloses that the second one of the plurality of pads is located toward a bottom end of the pad plunger (see Figure above). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to NATHAN C ZOLLINGER whose telephone number is (571)270-7815. The examiner can normally be reached Generally M-F 9-4 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, Essama Omgba can be reached at 469-295-9278. 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. /NATHAN C ZOLLINGER/Primary Examiner, Art Unit 3746
Read full office action

Prosecution Timeline

Apr 28, 2025
Application Filed
Mar 13, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12601341
DIAPHRAGM PUMP ADJUSTMENT PORTION FOR ADJUSTING RESONANT FREQUENCY OF DIAPHRAGM
2y 5m to grant Granted Apr 14, 2026
Patent 12601342
FLUID-ACTUATED MICROFLUIDIC MEMBRANE PUMP WITH DIFFERENTLY-SIZED INLET AND OUTLET PORTS
2y 5m to grant Granted Apr 14, 2026
Patent 12601334
VARIABLE DISPLACEMENT HYDRAULIC PUMP SYSTEM WITH OVER-TEMPERATURE PREVENTION
2y 5m to grant Granted Apr 14, 2026
Patent 12584495
Keyless Nesting Diffuser for Centrifugal Pumps
2y 5m to grant Granted Mar 24, 2026
Patent 12571385
HIGH-PRESSURE PLUNGER PUMP, AND USE OF A HIGH-PRESSURE PLUNGER PUMP
2y 5m to grant Granted Mar 10, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
69%
Grant Probability
99%
With Interview (+41.1%)
3y 0m
Median Time to Grant
Low
PTA Risk
Based on 851 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month