Prosecution Insights
Last updated: August 17, 2026
Application No. 18/675,308

Gas Separation Membrane

Non-Final OA §102§112
Filed
May 28, 2024
Priority
May 29, 2023 — JP 2023-087718
Examiner
JONES, CHRISTOPHER P
Art Unit
Tech Center
Assignee
Seiko Epson Corporation
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
2m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
1042 granted / 1371 resolved
+16.0% vs TC avg
Strong +25% interview lift
Without
With
+24.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
29 currently pending
Career history
1392
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
45.9%
+5.9% vs TC avg
§102
27.2%
-12.8% vs TC avg
§112
20.6%
-19.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1371 resolved cases

Office Action

§102 §112
DETAILED ACTION 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. Claim 3 is 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. Regarding claim 3, the limitation “wherein an area rate of a through hole penetrating the separation layer is more than 0% and 0.05% or less” is indefinite. Applicant appears to define “area rate of a through hole” by reciting that the “area rate of the through hole 31 is determined as a ratio of an area of a penetrating region to an area of an observation region by observing a cross section of the separation layer 3 with an electron microscope” in paragraph 42 of the Specification. It is unclear what the “area of a penetrating region” is referring to. It is unclear whether this is the area of the opening, the area of the interior of the penetrating region, or something else. It is also unclear what the “area of an observation region” is referring to. It is unclear what particular region the “observation region” is referring to. It is also unclear what “area” this is referring to (e.g. the cross section, the surface area, etc.) It appears that any region could be considered an “observation region”. It is also unclear how observing a cross section of the separation layer 3 with an electron microscope would yield an “area of an observation region”. 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. Claims 1, 2 and 4-12 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Ho USPA 2020/0398229 A1. Regarding claim 1, Ho discloses a gas separation membrane for separating carbon dioxide from a mixed gas containing the carbon dioxide and a non-target component (claims 1-4), the gas separation membrane comprising: a porous layer (paragraph 104; claim 1; figure 9); and a separation layer formed of a polymer material (claims 1-8) and in close contact with one surface of the porous layer (figure 9), wherein a gas selectivity ratio R.sub.CO2/R.sub.0 is 8 or more and less than 100, where R.sub.0 is a gas permeability of the non-target component in the gas separation membrane and R.sub.CO2 is a gas permeability of the carbon dioxide in the gas separation membrane (claims 52-54), and a gas permeability ratio B.sub.CO2/A.sub.CO2 is 4.0 or more and 128.0 or less, where A.sub.CO2 is a gas permeability of the carbon dioxide in the separation layer and B.sub.CO2 is a gas permeability of the carbon dioxide in the porous layer (claim 32 discloses the CO2 porous layer permeability and Table 13 discloses the CO2 separation layer permeability). It is noted that since claim 1 does not recite what the non-target component is, the claimed ratios would vary greatly depending on a selected non-target component. Therefore, even if Applicant claimed ratios that Ho did not disclose, the limitations would be met when calculated with some hypothetical non-target component. Regarding claim 2, Ho discloses that the polymer material contains an organopolysiloxane (claim 81), and an average thickness of the separation layer is 10 nm or more and 800 nm or less (paragraph 101). Regarding claims 4-11, the various gas selectivity ratios (see Ho claims 52-54) and gas permeability ratios (claim 32 and Table 13) are taught by Ho. It is noted that since claims 4-10 do not recite what the non-target component is, the claimed ratios would vary greatly depending on a selected non-target component. Therefore, even if Applicant claimed ratios that Ho did not disclose, the limitations would be met when calculated with some hypothetical non-target component. Regarding claim 12, Ho discloses that the non-target component is nitrogen (claims 52-54). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTOPHER P JONES whose telephone number is (571)270-7383. The examiner can normally be reached 9AM-6PM EST M-F. 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. /CHRISTOPHER P JONES/Primary Examiner, Art Unit 1776
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Prosecution Timeline

May 28, 2024
Application Filed
Jul 29, 2026
Non-Final Rejection mailed — §102, §112 (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

1-2
Expected OA Rounds
76%
Grant Probability
99%
With Interview (+24.9%)
2y 5m (~2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1371 resolved cases by this examiner. Grant probability derived from career allowance rate.

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