Prosecution Insights
Last updated: April 19, 2026
Application No. 18/552,057

METHOD AND SYSTEM FOR TREATING INDUSTRIAL PROCESS FLUIDS

Non-Final OA §112
Filed
Sep 22, 2023
Examiner
GURTOWSKI, RICHARD C
Art Unit
1773
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Wallenius Water Innovation AB
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
2y 10m
To Grant
99%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allow Rate
541 granted / 755 resolved
+6.7% vs TC avg
Strong +39% interview lift
Without
With
+39.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
35 currently pending
Career history
790
Total Applications
across all art units

Statute-Specific Performance

§101
2.4%
-37.6% vs TC avg
§103
43.7%
+3.7% vs TC avg
§102
19.8%
-20.2% vs TC avg
§112
29.3%
-10.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 755 resolved cases

Office Action

§112
DETAILED ACTION For this Office action, Claims 1-20 are pending. 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 Objections Claim 2 is objected to because of the following informalities: the claim recites “the step of transferring a part of an industrial process fluid…” instead of “the step of transferring a part of the industrial process fluid” as the step is recited in Claim 1. Appropriate correction is required. 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-20 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Independent Claims 1 and 10, upon which the remaining claims are dependent, both recite “adding an amount of this industrial process fluid concentrate to the industrial process fluid used in the system in order to maintain a predefined concentration level…whereby the industrial process fluid concentrate is provided into the system via the sensor device in the fluid treatment system” and “cleaning the sensor device at certain time intervals by providing the industrial process fluid concentrate into the sensor device and keeping the industrial process fluid concentrate in the sensor device for a certain time period” (similar limitations in Claim 10 found in the last two paragraphs of the claim). These two limitations, when taken together, are considered indefinite because the claim language is unclear how the certain time period for keeping the industrial process fluid concentrate in the sensor device is different from the time the concentrate is added to the fluid treatment system in order to read on the claim. The claims recite that the sensor device adds an amount of concentrate to the system, which would comprise said concentrate being in said sensor device for a certain time period (the longer the time period for the higher amount of concentrate to add). Since the cleaning function is similar to the addition function with respect to the sensor device, the claims are unclear how these two functions differentiate from each other—in particular with respect to the certain time period. Applicant is urged to address this issue in the response to this Office action, although they are advised that new grounds of rejection over prior art could be made based on any amendments made to address these issues. For purposes of this examination, the examiner will assume the certain time period is an extended cleaning period of time with respect to the time that the sensor delivers the concentrate. Claim 8 is further rejected under 35 U.S.C. 112(b) for reciting “the first pump”, which lacks established antecedent basis. See that “a first pump” is introduced in Claim 2, yet Claim 8 is dependent on Claim 1. Appropriate correction is required. Claims 15 and 16 are further rejected under 35 U.S.C. 112(b) for reciting “the ejector pump”, which lacks established antecedent basis. See that “an ejector pump” is introduced in Claim 14, yet Claims 15 and 16 are dependent on Claim 1. Appropriate correction is required. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Brown et al. (US Pat Pub. 2017/0008783) recites an antimicrobial batch dilution system in the same field of endeavor as the instant application, as it solves the mutual problem of providing a concentrate treatment solution to a process water supply using sensors (Abstract; Figure 1; Figure 2; Paragraph [0019]; Paragraph [0020]). The reference is silent on the method of cleaning the sensor, however, and no ground of rejection is made. Moses et al. (US Pat Pub. 2021/0294361) discloses a process fluid monitoring system in the same field of endeavor as the instant application, as it solves the mutual problem of monitoring and diverting fluid in a fluid delivery network in order to deliver additive, wherein the system is monitored by sensors (Abstract; Paragraph [0040]; Paragraph [0077]). The reference is silent on the method of cleaning the sensor, however, and no ground of rejection is made. Manda et al. (US Pat Pub. 2017/0281847) discloses a regenerative peritoneal dialysis system in the same field of endeavor as the instant claims, as it solves the mutual problem of providing sensors to determine concentration of osmotic agents in dialysate and control the addition of osmotic agents via the sensor readings (Abstract; Paragraph [0027]; Paragraph [0148]; Paragraph [0149]). The reference is silent on the method of cleaning the sensor, however, and no ground of rejection is made. Any inquiry concerning this communication or earlier communications from the examiner should be directed to RICHARD C GURTOWSKI whose telephone number is (571)272-3189. The examiner can normally be reached 9:00 am-5:30pm MT. 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, Benjamin Lebron can be reached at (571) 272-0475. 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. /RICHARD C GURTOWSKI/ Primary Examiner, Art Unit 1773 01/07/2026
Read full office action

Prosecution Timeline

Sep 22, 2023
Application Filed
Jan 07, 2026
Non-Final Rejection — §112
Mar 27, 2026
Interview Requested
Apr 08, 2026
Examiner Interview Summary
Apr 08, 2026
Applicant Interview (Telephonic)

Precedent Cases

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Patent 12565434
PREVENTION OF SILICA FOULING IN GEOTHERMAL BRINE
2y 5m to grant Granted Mar 03, 2026
Patent 12559301
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2y 5m to grant Granted Feb 24, 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
72%
Grant Probability
99%
With Interview (+39.2%)
2y 10m
Median Time to Grant
Low
PTA Risk
Based on 755 resolved cases by this examiner. Grant probability derived from career allow rate.

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