Prosecution Insights
Last updated: April 18, 2026
Application No. 18/416,849

METHODS AND DEVICES FOR PREPARING SINGLE-CRYSTAL CLADDINGS

Final Rejection §103
Filed
Jan 18, 2024
Examiner
KUNEMUND, ROBERT M
Art Unit
1714
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Meishan Boya Advanced Materials Co. Ltd.
OA Round
2 (Final)
82%
Grant Probability
Favorable
3-4
OA Rounds
3y 0m
To Grant
96%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allow Rate
1065 granted / 1301 resolved
+16.9% vs TC avg
Moderate +14% lift
Without
With
+14.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
37 currently pending
Career history
1338
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
60.4%
+20.4% vs TC avg
§102
11.6%
-28.4% vs TC avg
§112
9.3%
-30.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1301 resolved cases

Office Action

§103
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 . The following is a quotation of 35 U.S.C. 112(f): (f) Element in Claim for a Combination. – An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The following is a quotation of pre-AIA 35 U.S.C. 112, sixth paragraph: An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. This application includes one or more claim limitations that do not use the word “means,” but are nonetheless being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the claim limitation(s) uses a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the generic placeholder is not preceded by a structural modifier. Such claim limitation(s) is/are: preparation component, melt assembly and cladding assembly in claims 17-20. Because this/these claim limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, it/they is/are being interpreted to cover the corresponding structure described in the specification as performing the claimed function, and equivalents thereof. If applicant does not intend to have this/these limitation(s) interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, applicant may: (1) amend the claim limitation(s) to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph (e.g., by reciting sufficient structure to perform the claimed function); or (2) present a sufficient showing that the claim limitation(s) recite(s) sufficient structure to perform the claimed function so as to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 17 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yin et al (2018/00458883). The Yin et al reference teaches a method and apparatus of growing a single crystal cladding on an optical fiber, note, entire reference. The apparatus and method comprises melting a material to form a melt, submerging an optical fiber in the melt; forming a cladding around a periphery of the optical fiber based on the melt and the optical fiber, note claim and paras 0089, 0102. The cladding can be amorphous para 0103 and obtaining the single-crystal cladding by performing a crystallization process on the amorphous cladding paras 0118 and 0120. Once a material is in molten form it is no longer amorphous as amorphous refers to a solid state. The sole difference between the instant claim and the prior art is the state of the starting material. However, in the absence of unexpected results, it would have been obvious to one of ordinary skill in the art before the filing date of the instant invention to determine though routine experimentation the optimum ,operable starting material solid state, amorphous in the Yin et al reference in order to have a more uniform melting of the composition in the powder form. Claim(s) 18 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yin et al (2018/00458883) in view of Redjdal et al (2014/0217630). The Yin et al reference is relied on for the same reasons as stated, supra, and differs from the instant claim in the dispersing and cooling of the melt. However, the Redjdal et al reference teaches melting of the raw material, dispersing and cooling to form the amorphous material figure 1 and para 0031 and 0038. It would have been obvious to one of ordinary skill in the art before the filing date of the instant invention to modify the Yin et al process by the teachings of the Redjdal et al reference to disperse and cool the melt in order to prepare a purer amorphous material for cladding. Claim(s) 19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yin et al (2018/00458883) in view of Redjdal et al (2014/0217630). The Yin et al and Redjdal et al references are relied on for the same reasons as stated, supra, and differs from the instant claims in the collecting and oscillating. However, in the absence of unexpected results, it would have been obvious to one of ordinary skill in the art before the filing date of the instant invention to determine though routine experimentation the optimum ,operable to collect and oscillate the powder starting material in the combined references in order to not lose starting material and prevent clumping. Claim(s) 20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Yin et al (2018/00458883) in view of Redjdal et al (2014/0217630). The Yin et al and Redjdal et al references are relied on for the same reasons as stated, supra, and differs from the instant claims in the heating means. However, in the absence of unexpected results, it would have been obvious to one of ordinary skill in the art before the filing date of the instant invention to determine though routine experimentation the optimum ,operable heating means to crystalize the amorphous material in the combined references in order to heat the cladding layer without damage to the fiber. Response to Applicants’ Arguments Applicant's arguments filed March 7, 2026 have been fully considered but they are not persuasive. Applicants’ argument concerning claims 17 to 20 is noted. However, the amendment to claim 17 is method based. There is no additional structure or limitations set forth on the claim apparatus. The rejection over the apparatus claims will be maintained. Further, there has been no change in the 112(f) consideration as stated above. Claims 1-4, 6 to 16 and 21 are allowable over the art of record in view of the submitted amendments and applicants’ arguments. THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROBERT M KUNEMUND whose telephone number is (571)272-1464. The examiner can normally be reached M-F 8:00 am to 4:30 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, Kaj Olsen can be reached at 571-272-1344. 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. RMK /ROBERT M KUNEMUND/Primary Examiner, Art Unit 1714
Read full office action

Prosecution Timeline

Jan 18, 2024
Application Filed
Dec 07, 2025
Non-Final Rejection — §103
Mar 07, 2026
Response Filed
Apr 07, 2026
Final Rejection — §103 (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

3-4
Expected OA Rounds
82%
Grant Probability
96%
With Interview (+14.2%)
3y 0m
Median Time to Grant
Moderate
PTA Risk
Based on 1301 resolved cases by this examiner. Grant probability derived from career allow rate.

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