Prosecution Insights
Last updated: May 29, 2026
Application No. 18/573,773

FILTRATION ARRANGEMENTS AND FILTRATION APPARATUS

Non-Final OA §102
Filed
Dec 22, 2023
Priority
Jul 01, 2021 — WO PCT/EP2021/068151 +1 more
Examiner
GONZALEZ, MADELINE
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Renasys AS
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
6m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
589 granted / 813 resolved
+7.4% vs TC avg
Strong +16% interview lift
Without
With
+15.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
26 currently pending
Career history
839
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
71.8%
+31.8% vs TC avg
§102
7.9%
-32.1% vs TC avg
§112
10.3%
-29.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 813 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 Status Claims 1-3, 6-9, 16-17 and 25 are rejected. Claims 4-5, 10-15, 18-24 and 26 have been canceled. Election/Restrictions Applicant's election with traverse of Group I, claims 1-3, 6-9 and 17, in the reply filed on April 20, 2026, is acknowledged. The traversal is on the ground(s) that the uncanceled claims of Group III (claims 16 and 25) are essentially identical to the claims upon which they depend and there will be no search or examination burden. This is found persuasive, and claims 16 and 25 will be hereby examined. The requirement is still deemed proper and is therefore made FINAL. 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) 1-3, 6-9, 16-17 and 25 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Dooley, Jr. et al. (US 6,095,343) [hereinafter Dooley]. With respect to claim 1, Dooley discloses a gravity liquid filtration apparatus 10 (filtration arrangement), as shown in Fig. 1, having: a housing 20 (filtration vessel), as shown in Fig. 1; a filter media 64 (continuous filtering element) for removing particles from liquid passing therethrough, as shown in Fig. 4, the filtering element 64 being arranged to move along a path into the filtration vessel 20 and out from the filtration vessel 20, as shown in Fig. 1; and two discs 46, 48, (wheels) sealingly engaging the filtering element 64 on opposite sides thereof inside the filtration vessel 20, as shown in Figs. 1-4, where each of the two wheels 46, 48, is rotatable relative to the filtration vessel 20 along with movement of the filtering element 64, as shown in Fig. 4, wherein the filtration vessel 20 comprises two circular portions, said two circular portions being each of the ends of belt 60, as shown in Figs. 3-4, wherein the two wheels 46, 48, are forced into a respective of the circular portions with the filtering element 64 therebetween, as shown in Fig. 4, and wherein the filtration arrangement 10 further comprises at least one seal ring 54 (stationary wheel sealing member) arranged to seal between the filtering element 64 and a respective of the circular portions, as shown in Fig. 4. With respect to claim 2, Dooley discloses wherein the two wheels 46, 48, are vertically movable relative to the filtration vessel 20, (with tensioner assembly 44), as shown in Figs. 1 and 5 (see col. 3, lines 26-51). With respect to claim 3, Dooley discloses wherein each wheel 46, 48, comprises at least one peripheral edge 50 (seat), as shown in Fig. 4, and wherein the filtering element 64 is received in the seats 50, as shown in Fig. 4. With respect to claim 6, Dooley discloses wherein each stationary wheel sealing member 54 is received in a respective of the seat 50, as shown in Fig. 4 With respect to claim 7, Dooley discloses wherein the at least one stationary wheel sealing member 54 is made of plastic material (see col. 2, lines 61-63). With respect to claim 8, Dooley discloses wherein the filtration vessel 20 comprises two cavities, formed by walls 26, 28, laterally outside the respective wheels 46, 48, as shown in Fig. 2. With respect to claim 9, Dooley discloses a stationary cavity sealing member 54 in a bottom of each cavity, as shown in Figs. 2-4. With respect to claim 16, Dooley discloses a filtration apparatus for filtrating liquid, the filtration apparatus comprising a filtration arrangement 10, as shown in Fig. 1. With respect to claim 17, Dooley discloses a gravity liquid filtration apparatus 10 (filtration arrangement), as shown in Fig. 1, having: a filtration vessel 20, as shown in Fig. 1; a continuous filtering element 64 for removing particles from liquid passing therethrough, as shown in Fig. 4, the filtering element 64 being arranged to move along a path into the filtration vessel 20 and out from the filtration vessel 20, as shown in Fig. 1; and two wheels 46, 48, sealingly engaging the filtering element 64 on opposite sides thereof inside the filtration vessel 20, as shown in Fig 3, where each of the two wheels 46, 48, is rotatable relative to the filtration vessel 20 along with movement of the filtering element 64, as shown in Fig. 3, wherein the filtration vessel 20 comprises two cavities, formed by wall 26, 28, laterally outside the respective wheels 46, 48, as shown in Fig. 2, and wherein the filtration arrangement 10 further comprises a stationary cavity sealing member 54 in a bottom of each cavity, as shown in Figs. 2-4. With respect to claim 25, Dooley discloses a filtration apparatus for filtrating liquid, the filtration apparatus comprising a filtration arrangement 10, as shown in Fig. 1. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MADELINE GONZALEZ whose telephone number is (571)272-5502. The examiner can normally be reached M-F 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, 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. /MADELINE GONZALEZ/Primary Examiner, Art Unit 1773
Read full office action

Prosecution Timeline

Dec 22, 2023
Application Filed
May 19, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12636599
FILTER ELEMENT, FILTER HEAD, AND FILTER SYSTEM
3y 3m to grant Granted May 26, 2026
Patent 12636600
FILTER ELEMENT, FILTER DEVICE, ARRANGEMENT AND ASSEMBLY METHOD
3y 2m to grant Granted May 26, 2026
Patent 12629638
FILTER ASSEMBLY WITH ELECTRODE
3y 8m to grant Granted May 19, 2026
Patent 12605657
FILTRATION SYSTEM WITH IMPROVED STANDPIPE DESIGN
1y 5m to grant Granted Apr 21, 2026
Patent 12594513
ROTATABLE FILTER
2y 4m to grant Granted Apr 07, 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
88%
With Interview (+15.7%)
2y 11m (~6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 813 resolved cases by this examiner. Grant probability derived from career allowance rate.

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