Prosecution Insights
Last updated: April 19, 2026
Application No. 17/891,773

Electrochemical Dechlorination of Chloraminated Water and Wastewater Effluent

Non-Final OA §102
Filed
Aug 19, 2022
Examiner
KUMAR, SRILAKSHMI K
Art Unit
1700
Tech Center
1700 — Chemical & Materials Engineering
Assignee
The Board Of Trustees Of The Leland Stanford Junior University
OA Round
1 (Non-Final)
55%
Grant Probability
Moderate
1-2
OA Rounds
4y 1m
To Grant
71%
With Interview

Examiner Intelligence

Grants 55% of resolved cases
55%
Career Allow Rate
305 granted / 551 resolved
-9.6% vs TC avg
Strong +15% interview lift
Without
With
+15.2%
Interview Lift
resolved cases with interview
Typical timeline
4y 1m
Avg Prosecution
415 currently pending
Career history
966
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
47.7%
+7.7% vs TC avg
§102
21.1%
-18.9% vs TC avg
§112
21.0%
-19.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 551 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 . Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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) 1-3 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Yuji et al. (JP 6061315 B2). Yuji discloses an electrolytic method for dechlorination of wastewater (Yuji abstract) For claim 1, Yuji further teaches having an electrochemical reactor with a cathode and an anode (Yuji pg. 3 Lns. 3-6), and having water in the electrochemical reactor, wherein the water contains chlorine or chloramine (Yuji pg. 3 Lns. 27-28) , dechlorinating the water by passing electrons directly from an electrical grid to the chlorine via the cathode (Yuji Fig. 1 and Pg. 3 Lns. 38-42 ) PNG media_image1.png 330 483 media_image1.png Greyscale [AltContent: textbox (Fig. 1: Obtained and modified from Yuji et al.)] For claim 2, Yuji teaches that the cathode is a stainless steel cathode (Yuji Pg. 3 Lns. 11-12). For claim 3, Yugi further teaches that the cathode and the anode are separated by a cation-exchange membrane (Yuji pg. 3 Lns. 5-9 and 18 ). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ABELLINE K FIONAH whose telephone number is (571)272-4998. The examiner can normally be reached Monday-Friday 8am-5pm with every other Friday off. 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, James Lin can be reached at (571) 272-8902. 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. /ABELLINE KATUSIIME FIONAH/Examiner, Art Unit 1794 /BRIAN W COHEN/Primary Examiner, Art Unit 1759
Read full office action

Prosecution Timeline

Aug 19, 2022
Application Filed
Nov 13, 2025
Non-Final Rejection — §102 (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
55%
Grant Probability
71%
With Interview (+15.2%)
4y 1m
Median Time to Grant
Low
PTA Risk
Based on 551 resolved cases by this examiner. Grant probability derived from career allow rate.

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