Prosecution Insights
Last updated: April 19, 2026
Application No. 18/574,595

Membranes with Controlled Porosity for Serial Filtration

Non-Final OA §112
Filed
Dec 27, 2023
Examiner
PEO, JONATHAN M
Art Unit
1779
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Gradiant Corporation
OA Round
1 (Non-Final)
48%
Grant Probability
Moderate
1-2
OA Rounds
4y 2m
To Grant
97%
With Interview

Examiner Intelligence

Grants 48% of resolved cases
48%
Career Allow Rate
210 granted / 433 resolved
-16.5% vs TC avg
Strong +48% interview lift
Without
With
+48.1%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
54 currently pending
Career history
487
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
48.6%
+8.6% vs TC avg
§102
13.2%
-26.8% vs TC avg
§112
35.4%
-4.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 433 resolved cases

Office Action

§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 . Priority This application repeats a substantial portion of prior Application No. 17/305,289, filed July 2, 2021, and adds disclosure not presented in the prior application. Because this application names the inventor or at least one joint inventor named in the prior application, it may constitute a continuation-in-part of the prior application. Should applicant desire to claim the benefit of the filing date of the prior application, attention is directed to 35 U.S.C. 120, 37 CFR 1.78, and MPEP § 211 et seq. The presentation of a benefit claim may result in an additional fee under 37 CFR 1.17(w)(1) or (2) being required, if the earliest filing date for which benefit is claimed under 35 U.S.C. 120, 121, 365(c), or 386(c) and 1.78(d) in the application is more than six years before the actual filing date of the application. The Examiner notes that the limitations “includes chlorine at a concentration of 1-10 atomic percent” as in independent Claim 1 and dependent Claim 3 is not claimed or listed in the original Specification of the parent application 17/305,289. Thus, the Examiner determines this application is a possible CIP application and is given a filing date of December 27, 2023. Specification The specification is objected to as failing to provide proper antecedent basis for the claimed subject matter. See 37 CFR 1.75(d)(1) and MPEP § 608.01(o). Correction of the following is required: the limitation “includes chlorine at a concentration of 1-10 atomic percent” as in independent Claim 1 and dependent Claim 3, is not reflected in the instant Specification or Drawings of the instant Application. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claim 1, 3 and any of their dependent claims are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. The limitation “includes chlorine at a concentration of 1-10 atomic percent” in independent Claim 1 and dependent Claim 3 does not have clear or explicit support in the instant Specification or in parent application 17/305,289. Allowable Subject Matter The following is a statement of reasons for the indication of allowable subject matter: after conducting thorough searching and consideration, the Examiner indicates that the required combination of the limitation "an oxidized polyamide active layer having an atomic oxygen/nitrogen ratio of at least 1.5:1" with the limitation "includes chlorine at a concentration of 1-10 atomic percent”" in the field of "a serial filtration system" for independent Claim 1 is not found in the closest prior art such as Abusharkh, (US 9,206,060), Hamada et al., (“Hamada”, US 2020/0188861), and Cadotte, (US 4,277,344). However, the issues indicated above in the 112 rejection section must be resolved. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JONATHAN M PEO whose telephone number is (571)272-9891. The examiner can normally be reached M-F, 9AM-5PM. 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, Bobby Ramdhanie can be reached at 571-270-3240. 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. /JONATHAN M PEO/Primary Examiner, Art Unit 1779
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Prosecution Timeline

Dec 27, 2023
Application Filed
Feb 27, 2026
Non-Final Rejection — §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
48%
Grant Probability
97%
With Interview (+48.1%)
4y 2m
Median Time to Grant
Low
PTA Risk
Based on 433 resolved cases by this examiner. Grant probability derived from career allow rate.

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