Prosecution Insights
Last updated: April 19, 2026
Application No. 18/266,484

Polymeric Membrane

Non-Final OA §102
Filed
Jun 09, 2023
Examiner
MENON, KRISHNAN S
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Solventum Intellectual Properties Company
OA Round
1 (Non-Final)
60%
Grant Probability
Moderate
1-2
OA Rounds
3y 2m
To Grant
71%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
879 granted / 1475 resolved
-5.4% vs TC avg
Moderate +12% lift
Without
With
+11.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
72 currently pending
Career history
1547
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
31.5%
-8.5% vs TC avg
§102
29.4%
-10.6% vs TC avg
§112
26.4%
-13.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1475 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 . Election/Restrictions Claims 10-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b), as being drawn to a nonelected invention, there being no allowable generic or linking claim. Applicant timely traversed the restriction (election) requirement in the reply filed on 11/11/25. The request for rejoinder will be considered at the appropriate time. 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) claims 1-9 are rejected under 35 U.S.C. 102(a1) as being anticipated by Chandrasekharan et al (US 2011/0186518). Chandrasekharan teaches hollow fiber membranes coated in the lumen with genistein, a hydroxyisoflavone (figure 3.) The coating is complete as is described in [0081] and [0082]. The hollow fiber membrane is made of polysulfone, etc., see claim 3. Genistein also coats the pores – see [0137], [0152] and [0164] – coated in the finger-like channels; genistein crystalizes at the pore interface. Thus all the claims are anticipated. Claim(s) claims 1-3 and 6-9 are rejected under 35 U.S.C. 102(a1) as being anticipated by CN (CN110394066B.) CN teaches a membrane modified by coating of a polyphenol compound (genistein, tec., see claim 5.) The support membrane is polysulfone, etc. Since the solution is coated on the entire surface is as in applicant’s process, genistein will also penetrate the pores. Thus claim 1-3 and 6-9 are anticipated. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KRISHNAN S MENON whose telephone number is (571)272-1143. The examiner can normally be reached Flexible, but generally Monday-Friday: 8:00AM-4:30PM. 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, Prem Singh can be reached at 5712726381. 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. /KRISHNAN S MENON/Primary Examiner, Art Unit 1777
Read full office action

Prosecution Timeline

Jun 09, 2023
Application Filed
Oct 28, 2025
Examiner Interview Summary
Oct 28, 2025
Applicant Interview (Telephonic)
Nov 26, 2025
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12594366
TECHNIQUES FOR DIALYSIS BASED ON RELATIVE BLOOD VOLUME
2y 5m to grant Granted Apr 07, 2026
Patent 12582944
METHODS FOR TREATING POROUS MEMBRANES
2y 5m to grant Granted Mar 24, 2026
Patent 12577705
ASSEMBLY COMPRISING A CENTER-FLUID DISTRIBUTOR AND A MULTI-FIBER SPINNERET
2y 5m to grant Granted Mar 17, 2026
Patent 12577130
DRINKING WATER DISPENSER WITH ULTRAVIOLET DISINFECTION DEVICE
2y 5m to grant Granted Mar 17, 2026
Patent 12566160
PILLAR STRUCTURES
2y 5m to grant Granted Mar 03, 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
60%
Grant Probability
71%
With Interview (+11.7%)
3y 2m
Median Time to Grant
Low
PTA Risk
Based on 1475 resolved cases by this examiner. Grant probability derived from career allow rate.

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