Prosecution Insights
Last updated: October 23, 2026
Application No. 18/568,966

Membrane Cartridge and Membrane Cartridge Manufacturing Method

Final Rejection §103
Filed
Dec 11, 2023
Priority
Jun 11, 2021 — JP 2021-098088 +1 more
Examiner
KEYWORTH, PETER
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kubota Corporation
OA Round
2 (Final)
58%
Grant Probability
Moderate
3-4
OA Rounds
7m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 58% of resolved cases
58%
Career Allowance Rate
467 granted / 798 resolved
-6.5% vs TC avg
Strong +24% interview lift
Without
With
+23.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
47 currently pending
Career history
851
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
52.6%
+12.6% vs TC avg
§102
13.3%
-26.7% vs TC avg
§112
29.6%
-10.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 798 resolved cases

Office Action

§103
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 . Applicant’s Submission of a Response Applicant’s submission of a response was received on 7/16/2026. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 4-6 is/are rejected under 35 U.S.C. 103 as being unpatentable over Ishikawa et al. (US 2017/02399625 in IDS) in view of Ishikawa et al. (JP 2014-188446 in IDS hereinafter `446). Regarding claim 4, Ishikawa teaches membrane cartridge manufacturing method for manufacturing a membrane cartridge in which a filtration membrane is joined to a support plate that comprises a reference surface (surface between areas 231 and 232), a first joint portion (portion inside of (232)), and a second joint portion(232) retreated from the reference surface, the membrane cartridge manufacturing method comprising: placing the filtration membrane on a pre-joining support plate (21); and joining between the filtration membrane and the support plate at the first joint portion and the second joint portion through forming the second joint portion by pressing a pressing member (51) against the filtration membrane placed on the pre-joining support plate, from above the filtration membrane, so that a portion of the reference surface is retreated, wherein, in the pressing member, a first portion that faces the first joint portion is retreated from a second portion that forms the second joint portion (Figs. 2 and 5-8). Ishikawa fails to teach the first joint portion extending out from the reference surface and the first joint portion that extends out from the reference surface provided in advance on a pre-joining support plate. `446 teaches that for attaching a filter to a support plate it is beneficial to provide protrusions (Figs. 4-5) extending out from a reference surface so that no great stress is applied to the inner edge of the joint portion thereby preventing the filtration membrane from peeling or breaking off at the joint portion due to fatigue ([0036]-[0054] and Figs. 4-5). Further, `446 teaches that the protrusion extending from the surface can be provided on a pre-joining support plate in advance (Figs. 4-5) or the protrusion can be made during the forming process (Fig. 6). As such, one skilled in the art would have found it obvious to provide a protrusion extending from the references surface provided in advance on a pre-joining support plate in order to reduce stress on the outer joint and prevent breakage and peeling of the membrane from the support plate as providing such a protrusion extending from the reference surface is a known, equivalent way to provide a joint/protrusion rather than having a protrusion/joint formed solely during the manufacturing process. Regarding claim 5, as can be seen in Fig. 8 the first portion of the retreated in comparison to the height of the second portion in a distance smaller than the height of first joint portion from the reference surface. Regarding claim 6, Ishikawa teaches that the pressing member is heated (hot plate) ([0038]). Response to Arguments Applicant’s arguments with respect to claim(s) 4 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. It is noted that the above rejection has been modified to address the first joint extending out from the reference surface limitations. Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PETER KEYWORTH whose telephone number is (571)270-3479. The examiner can normally be reached 9-5 MT (11-7 ET). 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, Jennifer Dieterle can be reached at (571) 270-7872. 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. /PETER KEYWORTH/Primary Examiner, Art Unit 1776
Read full office action

Prosecution Timeline

Dec 11, 2023
Application Filed
Apr 20, 2026
Non-Final Rejection mailed — §103
Jun 16, 2026
Interview Requested
Jun 24, 2026
Examiner Interview Summary
Jun 24, 2026
Applicant Interview (Telephonic)
Jul 16, 2026
Response Filed
Oct 02, 2026
Final Rejection mailed — §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
58%
Grant Probability
82%
With Interview (+23.8%)
3y 6m (~7m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 798 resolved cases by this examiner. Grant probability derived from career allowance rate.

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