Prosecution Insights
Last updated: April 19, 2026
Application No. 18/231,531

METHOD FOR REMOVING A CONTAMINANT FROM WASTEWATER FROM AN INDUSTRIAL PLANT AND A SYSTEM FOR PERFORMING SUCH METHOD

Non-Final OA §112
Filed
Aug 08, 2023
Examiner
BREWSTER, HAYDEN R
Art Unit
1779
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Yara International Asa
OA Round
1 (Non-Final)
61%
Grant Probability
Moderate
1-2
OA Rounds
3y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allow Rate
327 granted / 534 resolved
-3.8% vs TC avg
Strong +50% interview lift
Without
With
+50.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
32 currently pending
Career history
566
Total Applications
across all art units

Statute-Specific Performance

§101
1.4%
-38.6% vs TC avg
§103
42.4%
+2.4% vs TC avg
§102
17.9%
-22.1% vs TC avg
§112
31.0%
-9.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 534 resolved cases

Office Action

§112
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 . 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 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. DETAILED NON-FINAL ACTION This is the initial Office Action (OA), on the merits, based on the 18/231,531 application filed on August 8, 2023. Claims 10-12, 14 and 15 are pending and have been fully considered. The examined claims are directed to an apparatus. Priority Receipt is acknowledged of papers submitted under 35 U.S.C. 119(a)-(d), which papers have been placed of record in the file. Information Disclosure Statement The Examiner has considered the information disclosure statements (IDS) submitted on 8-08-2023, 08-14-2023. Please refer to the signed copy of the PTO-1449 form attached herewith. Specification The title of the invention is the same or similar to an existing publication or patent and in that sense is not descriptive, if the instant claims and invention is considered different and unique compared to that publication/patent. Additionally, all claims are drawn to an apparatus or system but the title mentions a method and system. To the extent that the claims are unique, titles should be as well. A unique title that is more clearly indicative of the invention to which the claims are directed will assist future examiners and reviewers. Claim Objections Claim 10-12, 14 and 15 are objected to because of the following informalities: A comma or semicolon appear to be missing between elements a) and b), and a comma may be necessary after the term ‘optionally’ before item iv). Also, the “; and” before the last wherein clause seems inconsistent with the prior formatting. In claim 15, the ‘is’ at the end of the sentence is a typo. It was likely intended to be placed before ‘circulated.’ Claims 11, 12, 14 and 15 depend on claim 10. 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 10-12, 14 and 15 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 pre-AIA the applicant regards as the invention. In claim 10, since this is an apparatus claim, the structure associated with “a feed of a salt solution” is unclear. This seems to imply a structure capable of producing a salt solution or a source of salt solution integral to the apparatus that is fluidly connected to the second compartment. Is this a salt producing structure? The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), fourth paragraph: Subject to the [fifth paragraph of 35 U.S.C. 112 (pre-AIA )], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 15 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Corrected claim 15 recites “The system of claim 10 wherein the wastewater treated in the electrochemical treatment unit flows through the second compartment and is circulated to the industrial plant.” However, this is merely stating the path of a potential material worked upon without adding any additional structure. As such, claim 15 does not further limit claim 10. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Claims 11, 12, 14 and 15 depend on claim 10. Conclusion Examiner did not apply prior art at this time. This is a divisional of S/N 17/274,157, drawn to a related method. That application was allowed over Louwe et al. (WO2017103041) and Zou et al. (Electrodialysis recovery of reverse-fluxed fertilizer draw solute during forward osmosis water treatment, 330, Chem. Eng. J., 550, 550–58 (2017). See IDSes of 08-08 and 08-14-2023. Notably, in that allowance, adding a salt solution to or upstream of the second compartment, via a salt reservoir, appeared critical to the allowance, whereas the notion of a sat solution feed is optional in the current system claims. Electronic Inquiries Any inquiry concerning this communication or an earlier communications from the examiner should be directed to Hayden Brewster whose telephone number is (571) 270-1065. The examiner can normally be reached M-Th 9 AM - 4 PM. Alternatively, to contact the examiner, Applicant may send a communication, via e-mail or fax. Examiner’s direct fax number is: (571) 270-2065. Examiner's official e-mail address is: "Hayden.Brewster@uspto.gov." However, since e-mail communication may not be secure, Examiner will not respond to a substantive e-mail unless Applicant’s communication is in accordance with the provisions of MPEP §502.03 & related sections that discuss the required Authorization for Internet Communication (AIC). Nonetheless, all substantive communications will be made of record in Applicant’s file. To facilitate the Internet communication authorization process, Applicant may file an appropriate letter, or may complete the USPTO SB439 fillable form available at https://www.uspto.gov/sites/default/files/documents/sb0439.pdf, preferably in advance of any substantive e-mail communication. Since one may use an electronic signature with this particular form, Applicant is encouraged to file this form via the Office’s system for electronic filing of patent correspondence (i.e., the electronic filing system (Patent Center)). Otherwise, a handwritten signature is required. In addition to Patent Center, Applicant can submit their Internet authorization request via US Postal Service, USPTO Customer Service Window, or Central Fax. Examiner can also provide a one-time oral authorization, but this will only apply to video conferencing. It is improper to request Internet Authorization via e-mail. Examiner interviews are available via telephone, in-person, and via 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) form available at http://www.uspto.gov/interviewpractice, or Applicant may call Examiner, if preferable. Applicant can access a general list of patent application forms at either https://www.uspto.gov/patent/forms/forms-patent-applications-filed-or-after-september-16-2012 (applications filed on or after September 16, 2012) or https://www.uspto.gov/patent/forms/forms (applications filed before September 16, 2012). Note that the language in an AIR form is not a substitute for the requirements of an AIC, where appropriate. The mere filing of an Applicant Initiated Interview Request Form (PTOL-413A) or a Letter Requesting Interview with Examiner, in EFS-Web, may not apprise Examiner of such a request in a timely manner. If attempts to reach the Examiner are unsuccessful, Applicant may reach Examiner’s supervisor, Bobby Ramdhanie at 571-270-3240. The central 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. /HAYDEN BREWSTER/Examiner, AU 1779
Read full office action

Prosecution Timeline

Aug 08, 2023
Application Filed
Nov 29, 2025
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12589340
Rotary filter and associated filtering method
2y 5m to grant Granted Mar 31, 2026
Patent 12590016
FILTERING CONTAINER FOR LIQUIDS
2y 5m to grant Granted Mar 31, 2026
Patent 12583953
Method for Separating Polyisoprene and Other Apolar Valuable Substances from Vegetable Feedstock
2y 5m to grant Granted Mar 24, 2026
Patent 12577137
PROCESS FOR WATER TREATMENT USING IMMERSED GAS TRANSFER MEMBRANES
2y 5m to grant Granted Mar 17, 2026
Patent 12565635
Method Of Operation of a Perfusion System
2y 5m to grant Granted Mar 03, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
61%
Grant Probability
99%
With Interview (+50.4%)
3y 6m
Median Time to Grant
Low
PTA Risk
Based on 534 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month