Prosecution Insights
Last updated: April 19, 2026
Application No. 19/067,355

ELECTRODIALYSIS PROCESS AND BIPOLAR MEMBRANE ELECTRODIALYSIS DEVICES FOR SILICA REMOVAL

Non-Final OA §102
Filed
Feb 28, 2025
Examiner
HASKE, WOJCIECH
Art Unit
1794
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Texopco LLC
OA Round
1 (Non-Final)
73%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
91%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allow Rate
417 granted / 571 resolved
+8.0% vs TC avg
Strong +18% interview lift
Without
With
+17.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
39 currently pending
Career history
610
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
27.0%
-13.0% vs TC avg
§112
17.1%
-22.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 571 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 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) 1-7 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Xiong et al. (WO 2013036354 A1). Considering claim 1, Xiong discloses a bipolar membrane electrodialysis device comprising: one or more anion exchange membranes (20, 22); one or more bipolar membranes (33); and a pair of electrodes comprising a positive electrode (17) and a negative electrode (18) (Fig. 4 and [0042]). PNG media_image1.png 640 550 media_image1.png Greyscale Considering claim 2, Xiong discloses each bipolar membrane of the one or more bipolar membranes comprises an anionic material and a cationic material [0043]. Considering claim 3, Xiong discloses the one or more anion exchange membrane (20, 22) and the one or more bipolar membranes (33) form an alternating stack sandwiched between the positive electrode (17) and the negative electrode (18) of the pair of electrodes (Fig. 4 and [0042]). Considering claim 4, Xiong discloses the bipolar membrane electrodialysis device is configured to remove silica from a desalinated water stream (abstract). Considering claim 5, Xiong discloses an acid chamber (25) and an alkaline/base chamber (24) (Fig. 4 and [0022]). Considering claim 6, Xiong discloses a product inlet stream (12) of the bipolar membrane electrodialysis device flows through the alkaline/base chamber (24) [0018]. Considering claim 7, Xiong discloses a brine inlet stream (13) of the bipolar membrane electrodialysis device flows through the acid chamber (25) ([0029] and Fig. 4). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Wojciech Haske whose telephone number is (571)272-5666. The examiner can normally be reached M-F: 9:30 am - 6:00 pm. 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. /WOJCIECH HASKE/Examiner, Art Unit 1794
Read full office action

Prosecution Timeline

Feb 28, 2025
Application Filed
Dec 19, 2025
Non-Final Rejection — §102 (current)

Precedent Cases

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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
73%
Grant Probability
91%
With Interview (+17.6%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 571 resolved cases by this examiner. Grant probability derived from career allow rate.

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