Prosecution Insights
Last updated: April 19, 2026
Application No. 18/683,646

HOLLOW FIBER MICROPOROUS MEMBRANE, AND GAS SEPARATION MEMBRANE MODULE WITH SAME BUILT THEREINTO

Non-Final OA §102§112
Filed
Feb 14, 2024
Examiner
LAWRENCE JR, FRANK M
Art Unit
1776
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Toray Industries, Inc.
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allow Rate
1172 granted / 1399 resolved
+18.8% vs TC avg
Strong +20% interview lift
Without
With
+19.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
34 currently pending
Career history
1433
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
31.7%
-8.3% vs TC avg
§102
30.3%
-9.7% vs TC avg
§112
24.3%
-15.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1399 resolved cases

Office Action

§102 §112
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 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 11 and 12 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. Claims 11 and 12 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being incomplete for omitting essential structural cooperative relationships of elements, such omission amounting to a gap between the necessary structural connections. See MPEP § 2172.01. The omitted structural cooperative relationships are: In claims 11 and 12, the “skin layer” and “hydrophobic material” are recited but no relationship with the hollow fiber membrane of claim 8 is indicated. It is unclear whether the skin layer is the membrane, or if it is an additional layer attached to the membrane. Also, it is unclear whether the hydrophobic material relates to the membrane of claim 8 or if it is an additional material being claimed. 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) 8, 10 and 14 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yoshinaga et al. (8,409,325). Yoshinaga et al. ‘325 teach a hollow fiber membrane having a carbon dioxide flux of 41.1, a oxygen flux of 9.6 and a nitrogen flux of 2.25 (units 10-5 x cm3(STP)/(cm2·g·cmHg)), a ratio of carbon dioxide flux to nitrogen flux of about 20, a ratio of oxygen flux to nitrogen flux of about 4.3, and a tensile strength of 4.4 kgf/mm2 (converts to 308.2 cN/dtex assuming the average density of an aromatic polyimide is about 1.31-1.52 g/cm3). The hollow fibers can be used in a module for gas separation (see col. 13, lines 5-36, col. 18, lines 6-31, Example 2 in Tables 2 and 3, claim 1). Allowable Subject Matter Claims 9 and 13 are 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. Claims 11 and 12 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. The additional references listed on the attached PTO-892 form disclose hollow fiber membrane arrangements. Any inquiry concerning this communication or earlier communications from the examiner should be directed to FRANK LAWRENCE whose telephone number is (571)272-1161. The examiner can normally be reached Mon-Fri 8:30am-7pm. 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. /FRANK M LAWRENCE JR/Primary Examiner, Art Unit 1776 fl
Read full office action

Prosecution Timeline

Feb 14, 2024
Application Filed
Mar 09, 2026
Non-Final Rejection — §102, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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H2 DRYER FOR POWER PLANT USING ELECTROLYZER
2y 5m to grant Granted Apr 14, 2026
Patent 12594523
MEMBRANE CAPTURE OF CO2 FROM REFINERY EMISSIONS
2y 5m to grant Granted Apr 07, 2026
Patent 12595960
ADSORBER, PURIFICATION SYSTEM, AND PURIFICATION METHOD
2y 5m to grant Granted Apr 07, 2026
Patent 12592404
HUMIDIFIER
2y 5m to grant Granted Mar 31, 2026
Patent 12582940
MEMBRANE PRECONCENTRATION OF CARBON DIOXIDE FROM EXHAUST GAS SOURCES
2y 5m to grant Granted Mar 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
84%
Grant Probability
99%
With Interview (+19.8%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 1399 resolved cases by this examiner. Grant probability derived from career allow rate.

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