Prosecution Insights
Last updated: April 19, 2026
Application No. 18/498,795

WATER FILTRATION APPARATUS

Non-Final OA §112
Filed
Oct 31, 2023
Examiner
GURTOWSKI, RICHARD C
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Oyster Products LLC
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
2y 10m
To Grant
99%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allow Rate
541 granted / 755 resolved
+6.7% vs TC avg
Strong +39% interview lift
Without
With
+39.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
35 currently pending
Career history
790
Total Applications
across all art units

Statute-Specific Performance

§101
2.4%
-37.6% vs TC avg
§103
43.7%
+3.7% vs TC avg
§102
19.8%
-20.2% vs TC avg
§112
29.3%
-10.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 755 resolved cases

Office Action

§112
DETAILED ACTION For this Office action, Claims 1-20 are pending. 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 and 3-20 are 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. Independent Claims 1, 18 and 20 each recite a drip valve assembly comprising “a first arm disposed in proximity to the first elongated slit, the first arm [being] configured to move between a first extended position and a first retracted position”. The claims then recite a specific structure with respect to the first retracted position, yet said claims do not present limitations regarding the first extended position. This issue renders the claim indefinite because, in particular since specific structure has been established for the retracted position, the claim language is unclear what may be considered the first extended position. This issue is both resolved and underscored by the limitations of Claim 2 (which is not subject to the rejection due to resolving the issues of indefiniteness requiring the ground of rejection), which provides a structure for the first extended position; however, the fact the claimed embodiment with the structure established in Claim 2 is only a potential embodiment of such a position highlights the indefinite nature of the independent Claims and their respective dependents. Applicant is urged to address this issue in the response to this Office action. For purposes of this examination, the examiner will assume the first extended position is that described in instant Claim 2. Claim 14 is further rejected under 35 U.S.C. 112(b) for reciting “the container wall at the container top portion”, which lacks established antecedent basis. The container wall has only been established at the container top portion. Applicant is urged to address this issue in the response to this Office action. Claim 20 is further rejected under 35 U.S.C. 112(b) for reciting a second elongated slit, a second arm, a second retracted position and a third retracted position. This rejection is similar in logic to the grounds regarding the first elongated slit, arm, and positions above, as the same issues arise with said limitations. Applicant is urged to address this issue in the response to this Office action. For purposes of this examination, the examiner will assume the second extended position is similar in scope to the limitations of Claim 2 (see above with respect to the original ground of rejection). Allowable Subject Matter Claim 2 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Claim 2 is not rejected under 35 U.S.C. 112(b) for the reasons detailed above; the claim is, however, dependent on Claim 1, which is rejected above. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Collins et al. (US Pat Pub. 2008/0197062) discloses a plunger movable from a fully extended and fully retracted position the aid in a filtration technique (Abstract); however, while the plunger could be considered an arm, the function and structure is not the same. No ground of rejection could be made. van Savooijen et al. (US Pat Pub. 2012/0037549) discloses a filter assembly with a bypass valve member that may be placed in a retracted position to control fluid flow (Figures 1-4D; Paragraph [0055]; Paragraph [0089]; Paragraph [0099]; see bypass valve member 35). While this type of retracted position may be common in filter cartridges in the art, the structure is not similar to that of the instant application; therefore, no ground of rejection can be made. Any inquiry concerning this communication or earlier communications from the examiner should be directed to RICHARD C GURTOWSKI whose telephone number is (571)272-3189. The examiner can normally be reached 9:00 am-5:30pm MT. 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, Benjamin Lebron can be reached at (571) 272-0475. 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. /RICHARD C GURTOWSKI/Primary Examiner, Art Unit 1773 02/19/2026
Read full office action

Prosecution Timeline

Oct 31, 2023
Application Filed
Feb 19, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12595192
SYSTEM AND METHOD FOR PRODUCING ALKALINE WATER HAVING PH STABILITY AND INCREASED MINERAL CONTENT
2y 5m to grant Granted Apr 07, 2026
Patent 12590021
System and Methods for Wastewater Treatment
2y 5m to grant Granted Mar 31, 2026
Patent 12590983
Fluid Device And Method For Controlling Fluid Device
2y 5m to grant Granted Mar 31, 2026
Patent 12565434
PREVENTION OF SILICA FOULING IN GEOTHERMAL BRINE
2y 5m to grant Granted Mar 03, 2026
Patent 12559301
MEMBER, CONTAINER, CHEMICAL LIQUID STORAGE BODY, REACTOR, DISTILLATION COLUMN, FILTER UNIT, STORAGE TANK, PIPE LINE, AND CHEMICAL LIQUID MANUFACTURING METHOD
2y 5m to grant Granted Feb 24, 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
72%
Grant Probability
99%
With Interview (+39.2%)
2y 10m
Median Time to Grant
Low
PTA Risk
Based on 755 resolved cases by this examiner. Grant probability derived from career allow rate.

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