Prosecution Insights
Last updated: April 19, 2026
Application No. 18/236,500

APPARATUS FOR PRODUCING REDUCED SILICON NANOPOWDER USING LASER

Non-Final OA §112
Filed
Aug 22, 2023
Examiner
LANGEL, WAYNE A
Art Unit
1736
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Knu-Industry Cooperation Foundation
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
2y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
1275 granted / 1622 resolved
+13.6% vs TC avg
Strong +23% interview lift
Without
With
+23.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
46 currently pending
Career history
1668
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
33.6%
-6.4% vs TC avg
§102
2.0%
-38.0% vs TC avg
§112
37.6%
-2.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1622 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 . 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. Claim 4 is 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 metes and bounds of claim 4 are indefinite, since it depends from itself. Claims 1-3 and 5-8 are allowed. The following is a statement of reasons for the indication of allowable subject matter: KR 1023550088B1 discloses a silicon manufacturing device comprising a raw material container into which raw materials including silica and carbon are loaded; a reaction chamber in which the raw material container is accommodated; and a laser generating device for irradiating a laser onto the raw material container within the reaction chamber. (See claim 9 and Paragraph [0025] of the English translation.) However there is no teaching, disclosure or suggestion in the reference to include a motor and provide rotational force from the motor to rotate the raw material container, as required by applicant’s claims. Nor would there be any motivation from the prior art to modify the apparatus of KR 102355088B1 with such feature. Accordingly claims 1-3 and 5-8 are not rejected over KR 1023550088B1. Laine et al (US 2011/0206591) is made of record for disclosing a plasma process for producing silanes. DE 102011000543A1 is made of record for disclosing the carbothermic reduction of metal oxides to the corresponding metals. CN 110040734A is made of record for disclosing a method for preparing nano silicon by sintering a mixture of silica powder and graphene powder. CHO et al (US 2017/0190584) is made of record for disclosing a method for preparing nanoparticles using a laser beam. Any inquiry concerning this communication or earlier communications from the examiner should be directed to WAYNE A LANGEL whose telephone number is (571) 272-1353. The examiner can normally be reached Monday through Friday from 8:15 am to 4:15 pm. 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. /WAYNE A LANGEL/Primary Examiner, Art Unit 1736
Read full office action

Prosecution Timeline

Aug 22, 2023
Application Filed
Jan 27, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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Patent 12590043
COMPOSITIONS AND METHODS FOR IMPROVING PLANT GROWTH AND ABIOTIC STRESS TOLERANCE
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Patent 12583802
AUTONOMOUS DEVICE FOR IN-FIELD CONVERSION OF BIOMASS INTO BIOCHAR
2y 5m to grant Granted Mar 24, 2026
Patent 12583801
PROCESS FOR PRODUCING FERTILIZER FROM A BIOGAS STREAM
2y 5m to grant Granted Mar 24, 2026
Patent 12577179
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2y 5m to grant Granted Mar 17, 2026
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
79%
Grant Probability
99%
With Interview (+23.3%)
2y 7m
Median Time to Grant
Low
PTA Risk
Based on 1622 resolved cases by this examiner. Grant probability derived from career allow rate.

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