Prosecution Insights
Last updated: October 04, 2026
Application No. 18/479,419

HYDROTHERMAL ALKALINE TREATMENT OF PFAS-CONTAMINATED ADSORBENTS FOR CONTAMINANT MINERALIZATION AND ADSORBENT REGENERATION

Non-Final OA §112
Filed
Oct 02, 2023
Priority
Oct 03, 2022 — provisional 63/378,198
Examiner
HAILEY, PATRICIA L
Art Unit
1732
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Colorado School of Mines
OA Round
3 (Non-Final)
88%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allowance Rate
1135 granted / 1288 resolved
+23.1% vs TC avg
Moderate +10% lift
Without
With
+10.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
29 currently pending
Career history
1309
Total Applications
across all art units

Statute-Specific Performance

§101
2.4%
-37.6% vs TC avg
§103
46.2%
+6.2% vs TC avg
§102
15.1%
-24.9% vs TC avg
§112
27.3%
-12.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1288 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 . Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on August 27, 2026, has been entered. Applicants’ submission includes an amendment, in which claims 1, 4, 5, and 9 have been amended, and new claims 12-20 have been added. Claims 1-20 are presently pending in this application. Support for new claims 1-15 and 17-20 can be found as follows: Claims 12-15 and 17: claims 1-11; Claims 18 and 19: in paragraphs [0018], [0024], and [0026] of Applicants’ Specification; Claim 20: paragraphs [0012] and [0035] of Applicants’ Specification. New Objections and Rejections The following New Objections and Rejections are being made in view of the Examiner’s review of the Specification and of the addition of new claims 17 and 20. Specification The disclosure is objected to because of the following informalities: In paragraph [0015] of Applicants’ Specification, line 10 therein, delete "absorbed" and insert therefor --adsorbed--. Appropriate correction is required. Claim Objections Claims 17 and 20 are objected to because of the following informalities: In claim 17, “Ca(OH)2, Na2CO3, KOH, NH4OH, and Mg(OH)2” should be amended to recite “Ca(OH)2, Na2CO3, KOH, NH4OH, and Mg(OH)2”; see claim 6. In line 2 of claim 20, after “gas stream”, a period (“.”) should be added. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claim 16 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 16 is rejected because the limitation therein, “between about 10 atmospheres and about 500 atmospheres”, is not supported by Applicants’ Specification. While paragraph [0019] of Applicants’ Specification describes various parameters “to achieve destruction of the PFOS and regeneration of the adsorbent media…and the time at elevated temperature and pressure may be greater than about 60 seconds”, and that, “In other embodiments, process temperature, pH, alkaline substance, pressure, and time may vary depending on the individual PFAS to be targeted”, the Specification does not explicitly disclose a pressure range, such as that recited in claim 16. Allowable Subject Matter Claims 1-15 and 17-20 are allowed. The following is a statement of reasons for the indication of allowable subject matter: As stated in the previous Final Rejection, the prior art of record does not teach or suggest Applicants’ claimed method for treating and regenerating an adsorbent media, wherein a PFAS-contaminated adsorbent media is treated with an alkaline substance in a sealed reactor, in which the temperature in said reactor is increased to hydrothermal conditions with condensed-phase water at a temperature between about 150°C and about 374°C, wherein the alkaline substance is present in an amount sufficient to achieve a pH of at least 12, wherein an elevated temperature is maintained for a time sufficient to at least partially mineralize the PFAS and regenerate the adsorbent media, wherein the regenerated adsorbent media exhibits a Langmuir maximum adsorption capacity for perfluoropentanoic acid (PFPeA) that is at least 85% of a virgin adsorbent media; and wherein the adsorbent media is separated from the mineralized PFAS. Neither Nickelsen et al. (U. S. Patent Publication No. 2017/0297926), Strathmann et al. (U.S. Patent Publication No. 2020/0155885), Pinkard et al. (WO 2022/155271), or the cited references of record teach or suggest Applicants’ claimed method. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to PATRICIA L HAILEY whose telephone number is (571)272-1369. The examiner can normally be reached Monday-Friday, 7 a.m. to 3:30 p.m. 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, Ching-Yiu (Coris) Fung, can be reached at 571-270-5713. 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. /Patricia L. Hailey/Primary Examiner, Art Unit 1732 September 8, 2026
Read full office action

Prosecution Timeline

Oct 02, 2023
Application Filed
Mar 16, 2026
Non-Final Rejection mailed — §112
May 29, 2026
Response Filed
Jul 17, 2026
Final Rejection mailed — §112
Aug 27, 2026
Request for Continued Examination
Aug 31, 2026
Response after Non-Final Action
Sep 11, 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

3-4
Expected OA Rounds
88%
Grant Probability
98%
With Interview (+10.1%)
2y 4m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1288 resolved cases by this examiner. Grant probability derived from career allowance rate.

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