Prosecution Insights
Last updated: May 29, 2026
Application No. 18/284,362

METHOD FOR PRODUCING TANTALUM POWDER AND TANTALUM POWDER OBTAINED BY THE METHOD

Non-Final OA §112
Filed
Sep 27, 2023
Priority
Dec 15, 2021 — CN 202111533324.8 +1 more
Examiner
MCGUTHRY BANKS, TIMA MICHELE
Art Unit
1733
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Ningxia Orient Tantalum Industry Co. Ltd.
OA Round
2 (Non-Final)
82%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
84%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
949 granted / 1163 resolved
+16.6% vs TC avg
Minimal +2% lift
Without
With
+2.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
41 currently pending
Career history
1226
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
52.7%
+12.7% vs TC avg
§102
6.2%
-33.8% vs TC avg
§112
33.4%
-6.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1163 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 . Status of Claims Claims 1, 2, 6, 7, 14, and 16 are currently amended, Claims 3-5, 10-13, and 15 are as previously presented, and Claims 8 and 9 are withdrawn and as previously presented. Group I, Claims 1-7 and 10-16, is elected and Group II, Claims 8 and 9, is withdrawn from consideration. 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. Claims 1-7 and 10-16 are 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. In Claim 1, the limitation “alkali metal and/or alkaline earth metal halide” in line 4 reads on either “alkali metal” or “alkali metal halide” as currently recited. Based on the specification in Examples 1-5 on pages 7-11, alkali metal halides are used; there are no examples of using alkali metals. As written, the limitation “alkali metal and/or alkali metal halide” is broader in scope than what is recited in the specification. Suggested language is “at least one alkali metal halide and/or alkaline earth metal halide.” Claims dependent on any of the rejected claims are likewise rejected under this statute. 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 1-7 and 10-16 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. In Claim 1, line 10, it is not clear of the source of “excessive metal.” The claim does not recite how the “excessive metal” relates to steps (1)-(3), alkali metal and/or alkaline earth metal halides, or tantalum powder raw material. In Claim 6, it is not clear what is meant by “effective element” in line 2. Does an “effective element” include B, P, or N or does it refer to an unrecited element? In Claim 16, it is not clear what is meant by “effective element” in line 2. Does an “effective element” include B, P, or N or does it refer to an unrecited element? Claims dependent on any of the rejected claims are likewise rejected under this statute. Allowable Subject Matter Claims 1-7 and 10-16 are free from prior art rejections but are not in allowable form because of the rejection under 35 U.S.C. 112(a). Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. He et al (US 2003/0110890 A1) teaches reacting Ta and/or Nb oxides with at least one metal halide (Mg, Ca, Sr, Ba, and Ce) [0007] at 600-1000 °C [0011] in a closed reactor in an inert atmosphere [0014 and 0015]. Vacuum treatment occurs in a separate furnace [0032, 0043]. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Tima M. McGuthry-Banks whose telephone number is (571)272-2744. The examiner can normally be reached Monday through Friday, 7:30 am to 4:00 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, Keith D. Hendricks can be reached at (571) 272-1401. 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. Tima M. McGuthry-Banks Primary Examiner Art Unit 1733 /TIMA M. MCGUTHRY-BANKS/Primary Examiner, Art Unit 1733
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Prosecution Timeline

Sep 27, 2023
Application Filed
Feb 11, 2026
Non-Final Rejection mailed — §112
Feb 27, 2026
Response Filed
Mar 03, 2026
Examiner Interview (Telephonic)
Mar 20, 2026
Non-Final Rejection mailed — §112
Apr 10, 2026
Response Filed

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
82%
Grant Probability
84%
With Interview (+2.0%)
2y 4m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1163 resolved cases by this examiner. Grant probability derived from career allowance rate.

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