Prosecution Insights
Last updated: July 17, 2026
Application No. 18/660,071

EFFICIENT RARE EARTH AND CRITICAL MATERIAL RECOVERY FROM RARE EARTH MAGNETS

Non-Final OA §112
Filed
May 09, 2024
Priority
May 11, 2023 — provisional 63/501,407
Examiner
LIANG, ANTHONY M
Art Unit
Tech Center
Assignee
Battelle Memorial Institute
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
9m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
563 granted / 675 resolved
+23.4% vs TC avg
Moderate +10% lift
Without
With
+9.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
34 currently pending
Career history
704
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
58.4%
+18.4% vs TC avg
§102
3.6%
-36.4% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 675 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 . Claim Objections Claim 19 is objected to because of the following informalities: In line 1, “process of claim 13” should read –process of claim 13, –. 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. The term “efficient” in claims 1 and 13 is a relative term which renders the claim indefinite. The term “efficient” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. It is unclear what and would not be considered efficient, which renders the metes and bounds of the claims indefinite. Claims 1 and 13 recite the limitation “critical material recovery,” which renders the claims indefinite, because it is unclear what materials are considered “critical.” Claims 2-12 are dependent on claim 1 and are thus rejected for the same reasons. Claims 14-20 are dependent on claim 13 and are thus also rejected for the same reasons detailed above. Allowable Subject Matter Claims 1-20 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: Regarding claims 1 and 13, the prior art fails to disclose or fairly suggest the processes as recited. In particular, the closest prior art, Klemettinen et al. (KLEMETTINEN, et al., "Leaching of Rare Earth Elements from NdFeB Magnets without Mechanical Pretreatment by Sulfuric (H2SO4) and Hydrochloric (HCI) Acids", Minerals 2021, 11, 1374, 6 December 2021, pages 1-18.), as cited in the IDS dated 5/20/2024, hereinafter “Klemettinen,” teaches process of rare earth material recovery from an NdFeB rare earth magnet, the process comprising demagnetizing the rare earth magnet, crushing and milling the rare earth magnet, leaching the rare earth magnet, and precipitating the rare earth magnet (p. 3, Figure 1). However, Klemettinen fails to teach or adequately suggest wherein the leaching process extracts rare earth element phosphates, as required by claims 1 and 13, and further fails to teach or adequately suggest wherein the precipitation process extracts rare earth element sulfates, as required by claim 1. Thus, claims 1 and 13 are distinct over the teachings of the prior art. Claims 2-12 further limit the subject matter of claim 1 and are thus also distinct over the teachings of the prior art. Claims 14-20 further limit the subject matter of claim 13 and are thus also distinct over the teachings of the prior art. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANTHONY M LIANG whose telephone number is (571)272-0483. The examiner can normally be reached M-F: 9:00am-5:00pm. 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, Jonathan Johnson can be reached at (571)272-1177. 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. /ANTHONY M LIANG/Primary Examiner, Art Unit 1734
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Prosecution Timeline

May 09, 2024
Application Filed
Jun 22, 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
83%
Grant Probability
93%
With Interview (+9.7%)
2y 11m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 675 resolved cases by this examiner. Grant probability derived from career allowance rate.

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