Prosecution Insights
Last updated: April 19, 2026
Application No. 18/563,151

Filter

Non-Final OA §102
Filed
Nov 21, 2023
Examiner
MILLER-CRUZ, EKANDRA S.
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
3M Company
OA Round
1 (Non-Final)
66%
Grant Probability
Favorable
1-2
OA Rounds
2y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 66% — above average
66%
Career Allow Rate
217 granted / 331 resolved
+0.6% vs TC avg
Strong +52% interview lift
Without
With
+52.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
32 currently pending
Career history
363
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
44.8%
+4.8% vs TC avg
§102
16.5%
-23.5% vs TC avg
§112
26.9%
-13.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 331 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 1-7 are pending: Claims 1-7 are rejected. Priority Acknowledgment is made of applicant’s claim for foreign priority under 35 U.S.C. 119 (a)-(d). The certified copy has been filed in parent Application No. JP 2021-092755 filed on 06/02/2021. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. Claims 1-7 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Hirozawa (US 2017/0361280). Regarding claim 1, Hirozawa teaches a filter (separation membrane element, see ABS) comprising a filter element (Figs. 10-12, separation membrane elements 100A-C) having a filter member with a tubular shape disposed on an outer side of a porous tube (Figs. 10-12, water collection tube 6) (see ¶81), wherein the filter member has an embossed portion formed on a surface of the filter member (the separation membrane can include one which is embossed, see ¶36 and ¶107-¶112). Regarding claim 2, Hirozawa teaches the filter according to claim 1, wherein the filter member is a sheet-like member, and is wound around the porous tube (see Figs. 8 and 10-12 wherein sheets around surrounding water collection tube 6). Regarding claim 3, Hirozawa teaches the filter according to claim 2, wherein the filter element includes a wound laminated sheet of the filter member and a net-like substrate (the laminate including the porous supporting layer, see ¶71; a member such as a net, see ¶139). Regarding claim 4, Hirozawa teaches the filter according to claim 2, wherein in the filter element, the filter member is continuously laminated (the separation membrane is continuously formed, see ¶70; the laminate including the porous supporting layer, see ¶71) in a radial direction (see Figs. 8 and 10-12 wherein the separation membrane has a circular or cylindrical membrane which defines a radius extends in a radial direction). Regarding claim 5, Hirozawa teaches the filter according to claim 2,wherein, in the filter element, a plurality of the filter members having different ventilation resistances are laminated in the radial direction and wound (see ¶41). Regarding claim 6, Hirozawa teaches the filter according to claim 2, wherein the filter member has pores (the porous sheet having pores, see ¶78). Regarding claim 7, Hirozawa teaches the filter according to claim 1, wherein the filter member is disposed on the outer side of the porous tube (see Figs. 8 and 10-12 wherein sheets around surrounding water collection tube 6), the filter member being folded into a pleated shape (the separation functional layer has a pleated structure, see ¶43). Claims 1-2 and 4 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Barger (USPN 6,632,357). Regarding claim 1, Barger teaches a filter (permeable membrane system, see ABS) comprising a filter element (Figs. 1-6, permeable membrane system 10) having a filter member with a tubular shape disposed on an outer side of a porous tube (Figs. 1-6, product tube 30; the product tube 30 receives a plurality of laminated compositions forming a porous structure), wherein the filter member has an embossed portion (Figs. 1-6, projections 24 on outside surfaces 20, 22 defined by a plurality of embossed islands) formed on a surface of the filter member. Regarding claim 2, Barger teaches the filter according to claim 1, wherein the filter member is a sheet- like member (sheets 14, 16), and is wound around the porous tube (see Figs. 3 and 6 of wound configuration). Regarding claim 4, Barger teaches the filter according to claim 2, wherein in the filter element, the filter member is continuously laminated in a radial direction (i.e. laminated compositions) (see Figs. 3 and 5 wherein the separation membrane has a circular or cylindrical membrane which defines a radius extends in a radial direction). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to EKANDRA S. MILLER-CRUZ whose telephone number is (571)270-7849. The examiner can normally be reached M-Th 7 am - 6 pm 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, Benjamin L. 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. /EKANDRA S. MILLER-CRUZ/Primary Examiner, Art Unit 1773
Read full office action

Prosecution Timeline

Nov 21, 2023
Application Filed
Jan 17, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12595199
ROTATING BIOLOGICAL CONTACTOR MEDIA AND SHAFT/LOAD TRANSFER MECHANISM
2y 5m to grant Granted Apr 07, 2026
Patent 12590019
STRAIGHT-LINE SEWAGE TREATMENT SYSTEM FOR ENHANCED TREATMENT OF LOW C/N DOMESTIC SEWAGE
2y 5m to grant Granted Mar 31, 2026
Patent 12590431
PORTABLE OIL SKIMMER
2y 5m to grant Granted Mar 31, 2026
Patent 12589360
HYDROPHILIC MEMBRANE SEPARATION LAYER
2y 5m to grant Granted Mar 31, 2026
Patent 12589359
MEMBRANE HOLDER AND MEMBRANE MODULE
2y 5m to grant Granted Mar 31, 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
66%
Grant Probability
99%
With Interview (+52.4%)
2y 7m
Median Time to Grant
Low
PTA Risk
Based on 331 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