Prosecution Insights
Last updated: July 17, 2026
Application No. 18/573,617

METHOD FOR THE PREPARATION OF A MATERIAL COMPRISING SILICON NANOWIRES AND TIN

Non-Final OA §112
Filed
Dec 22, 2023
Priority
Jun 24, 2021 — EU 21305870.4 +1 more
Examiner
MCCONNELL, WYATT P
Art Unit
Tech Center
Assignee
Enwires
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
90%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
842 granted / 1046 resolved
+20.5% vs TC avg
Moderate +9% lift
Without
With
+9.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
24 currently pending
Career history
1067
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
76.3%
+36.3% vs TC avg
§102
10.3%
-29.7% vs TC avg
§112
8.8%
-31.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1046 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(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 20 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Claim 20 depends from claim 15. Claim 15 requires “applying a thermal treatment at a temperature ranging from 200 C to 900 C.” The only limitation claim 20 adds to this is “the thermal treatment is performed at a temperature ranging from 200 C to 900 C” which is the exact same thing already required by claim 15. Thus, claim 20 is exactly co-extensive with claim 15, failing to limit it. Allowable Subject Matter Claims 15-19 and 21-30 are allowed. The prior art discloses a method of making silicon nanowire/tin composite materials. See, e.g., U.S. Patent Application Publication No. 2019/0047870. However, the methods for making those materials differ from the claimed method, either involving the use of tin nanoparticles, or the use of tin-sulfide nanoparticles. In some embodiments, those tin sulfide particles are derived from tin chloride. However, the tin chloride is fully converted to tin sulfide prior to any combination of nanoparticles with a substrate. See Example 1 of the ‘870 publication. Thus, the prior art is silent regarding a method of preparing a composite material comprising at least silicon nanowires and tin where the method comprises steps of introducing tin halide and a growth support into a reaction chamber and solid/solid mixing the tin halide and growth support. Any inquiry concerning this communication or earlier communications from the examiner should be directed to WYATT P MCCONNELL whose telephone number is (571)270-7531. The examiner can normally be reached 9am to 5pm M-F. 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, Barbara Gilliam can be reached at 571-272-1330. 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. /WYATT P MCCONNELL/Examiner, Art Unit 1727
Read full office action

Prosecution Timeline

Dec 22, 2023
Application Filed
Jun 16, 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
80%
Grant Probability
90%
With Interview (+9.4%)
2y 7m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1046 resolved cases by this examiner. Grant probability derived from career allowance rate.

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