Prosecution Insights
Last updated: October 02, 2026
Application No. 18/463,325

METHOD AND SYSTEM FOR TREATMENT OF SALINE-ALKALI WATER BY MULTI-MEMBRANE NANOFILTRATION AND PHOTOTHERMAL CONVERSION

Non-Final OA §112
Filed
Sep 08, 2023
Priority
Sep 08, 2022 — CN 202211094743.0
Examiner
SPIES, BRADLEY R
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Zhejiang University
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
622 granted / 838 resolved
+9.2% vs TC avg
Strong +20% interview lift
Without
With
+20.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
38 currently pending
Career history
858
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
50.2%
+10.2% vs TC avg
§102
17.8%
-22.2% vs TC avg
§112
18.7%
-21.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 838 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 . Election/Restrictions Applicant’s election without traverse of Group I, claims 1-7 in the reply filed on 2/10/2026 is acknowledged. Claim 8 is withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. 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. Claims 1-7 are rejected under 35 U.S.C. 112(b), as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor regards as the invention. With respect to claim 1, the claim lists two separate equations for calculation the outflow velocity of a given pool, vn, as well as an additional intermediate equation for calculating a component therof; the two equations for calculating vn will be referred to herein as “Equation 1” and “Equation 3” for brevity as follows: Equation 1: PNG media_image1.png 68 341 media_image1.png Greyscale Equation 3: PNG media_image2.png 70 328 media_image2.png Greyscale As best understood, Equation 1 and Equation 3 are intended to represent the same general calculation, with Equation 1 being simplified into Equation 3 using certain relationships described in the claim. However, it is not clear that these two have the same scope, as it appears that certain simplifications i.e. the determination of the boundary condition flowrates may involve assumptions or approximations and therefore the two equations may not have precisely the same scope. This leads to indefiniteness because it is not clear what the precise required scope of calculation is for determining and controlling the outflow velocity in the claimed process. From the context of the disclosure it appears as if the equation identified above as Equation 3 is the equation intended for use in controlling the process of the invention, whereas Equation 1 is intended as a more general equation representing conservation of salinity (see [0045-0052] of the instant specification); in this case, examiner suggests omitting Equation 1 from the claim language and instead reciting only those equations and terms which are necessary for carrying out the process as intended i.e. by defining those variables which must be measured or controlled, defining those relationships required for calculating the necessary derived values, and relating them as appropriate to the terms of the equation defining the outflow velocity. Claims 2-7 depend directly or indirectly from claim 1 and are indefinite for the same reasons. Allowable Subject Matter Claims 1-7 are rejected as indefinite for the reasons discussed above; however, as their scope is currently understood, they are free from the prior art. The closest prior art is represented by Fang et al (CN 111268844 A) which teaches saline-alkali water desalination in which water is preliminarily treated through membrane separation including nanofiltration to separate saline water from alkali water, and then is fed to an evaporation subsystem where solar heating is employed to concentrate the salt. Fang is silent to the specific arrangement of evaporation pools and, most particularly, to controlling the outflow of such evaporation pools or equivalent structures according to the claimed process steps i.e. employing the claims equations and relations contributing to such. While evaporation ponds are well known in the art and the concept of flow control is common in the art, there is no teaching or suggestion in the prior art of employing the specific claimed control process for such an application and the prior art, alone or in combination, would not have led one of ordinary skill in the art to arrive at the claimed process. As such, claims 1-7 are free from the prior art. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BRADLEY R SPIES whose telephone number is (571)272-3469. The examiner can normally be reached Mon-Thurs 8AM-4PM. 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, Vickie Kim can be reached at 571-272-0579. 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. /BRADLEY R SPIES/Primary Examiner, Art Unit 1776
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Prosecution Timeline

Sep 08, 2023
Application Filed
Aug 19, 2026
Non-Final Rejection mailed — §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
74%
Grant Probability
95%
With Interview (+20.5%)
2y 4m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 838 resolved cases by this examiner. Grant probability derived from career allowance rate.

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