Prosecution Insights
Last updated: April 19, 2026
Application No. 17/807,598

METHODS FOR SAFE DISPOSAL OF MERCURY FROM MERCURY-CONTAMINATED WASTE

Non-Final OA §102
Filed
Jun 17, 2022
Examiner
MCCLAIN, STARFARI TESHAWN
Art Unit
1736
Tech Center
1700 — Chemical & Materials Engineering
Assignee
US Ecology Holdings, Inc.
OA Round
1 (Non-Final)
92%
Grant Probability
Favorable
1-2
OA Rounds
3y 4m
To Grant
99%
With Interview

Examiner Intelligence

Grants 92% — above average
92%
Career Allow Rate
24 granted / 26 resolved
+27.3% vs TC avg
Moderate +9% lift
Without
With
+8.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 4m
Avg Prosecution
13 currently pending
Career history
39
Total Applications
across all art units

Statute-Specific Performance

§101
5.1%
-34.9% vs TC avg
§103
53.3%
+13.3% vs TC avg
§102
27.0%
-13.0% vs TC avg
§112
14.6%
-25.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 26 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 . Election/Restrictions Applicant’s election without traverse of Group II (claims 15-20) in the reply filed on 11/04/2025 is acknowledged. 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 15-20 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Fuhrmann (“Sulfur Polymer Solidification/Stabilization of elemental mercury waste”, 2001) . With respect to claim 15, the claim requires “A mercury-including waste product,” Fuhrmann teaches metallic mercury and mixed mercury waste (Fuhrmann 328, 2.1. Processing materials) claim 15 further requires a “mercury-including waste product comprising: solid structures and pellets and the pellets solid structures comprising of mercuric sulfide within a polymer material.” Fuhrmann teaches generating mercuric sulfide and then solidifying that material in a solid sulfur matrix (Sulfur polymer cement, SPC) and casting the treated waste into pellets (Fuhrmann 329, 3. Test Methods: treated waste) (Fuhrmann 333, 5. Summary and conclusions: mercuric sulfide). Regarding claim 16, Fuhrmann teaches centrifuging the reacted mixture to obtain a completed reaction, which could be considered as substantially evenly distributed (Fuhrmann 329, 3. Test Methods: Completeness). Regarding claim 17, Fuhrmann teaches extra SPC (sulfur polymer cement) was added after the mercury had completely reacted with the sulfur to solidify and encapsulate the mercury waste (Fuhrmann 329, 3.1. Processing of mercury waste). Regarding claim 18, Fuhrmann teaches solidifying mercuric sulfide in a solid sulfur matrix of the sulfur polymer cement (SPC) (Fuhrmann 333, 5. Summary and conclusions: mercuric sulfide). Regarding claim 19, Fuhrmann teaches sulfur polymer cement (SPC) solidifying the mercury waste poured into metal cans (Fuhrmann 329, 3.1. Processing of mercury waste) Regarding claim 20, Fuhrmann teaches producing the treated waste into pellets (Fuhrmann 329, 3. Test Methods: treated waste). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to STARFARI TESHAWN MCCLAIN whose telephone number is (571)272-0169. The examiner can normally be reached M-F 8 AM- 5 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, Anthony Zimmer can be reached at (571) 270-3591. 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. /STARFARI TESHAWN MCCLAIN/ Examiner, Art Unit 1736 /DANIEL C. MCCRACKEN/ Primary Examiner, Art Unit 1736
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Prosecution Timeline

Jun 17, 2022
Application Filed
Dec 11, 2025
Non-Final Rejection — §102 (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
92%
Grant Probability
99%
With Interview (+8.7%)
3y 4m
Median Time to Grant
Low
PTA Risk
Based on 26 resolved cases by this examiner. Grant probability derived from career allow rate.

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