Prosecution Insights
Last updated: April 18, 2026
Application No. 18/728,269

OPTICAL FIBER PRODUCTION DEVICE AND OPTICAL FIBER PRODUCTION METHOD

Non-Final OA §102
Filed
Jul 11, 2024
Examiner
DAIGLER, CHRISTOPHER PAUL
Art Unit
1741
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Sumitomo Electric Industries, Ltd.
OA Round
1 (Non-Final)
56%
Grant Probability
Moderate
1-2
OA Rounds
3y 2m
To Grant
99%
With Interview

Examiner Intelligence

Grants 56% of resolved cases
56%
Career Allow Rate
5 granted / 9 resolved
-9.4% vs TC avg
Strong +57% interview lift
Without
With
+57.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
39 currently pending
Career history
48
Total Applications
across all art units

Statute-Specific Performance

§101
1.3%
-38.7% vs TC avg
§103
59.1%
+19.1% vs TC avg
§102
9.3%
-30.7% vs TC avg
§112
28.3%
-11.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 9 resolved cases

Office Action

§102
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 . DETAILED ACTION Priority The Examiner recognizes Foreign Priority to JP2022-117784, with a filing date of 07/25/2022 Information Disclosure Statement (IDS) The information disclosure statement(s) (IDS) submitted on 07/11/2024, 10/23/2025 and 01/29/2026 is/are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. Please refer to applicant’s copy of the 1449 herewith. Election/Restrictions Applicant’s election without traverse of claim 8 in the reply filed on 03/12/2026 is acknowledged. Claims 1-7 is/are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected optical fiber production device, there being no allowable generic or linking claim. Election was made without traverse in reply filed on 03/12/2026. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 8 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated USPGPUB 20100319405A1 by Okada (herein “Okada”) Regarding Claim 8 – Okada teaches, An optical fiber production method of forming an optical fiber by coating, with a resin, a glass fiber drawn from a glass base material in a drawing furnace; [0012] lines 1-6, [0050], lines 3-6, “An optical fiber manufacturing device of an exemplary embodiment includes: a bare optical fiber-forming unit that forms a bare optical fiber by pulling an optical fiber preform; a coating unit that forms an optical fiber by coating the bare optical fiber outputted from the bare optical fiber-forming unit with a coating layer, “The optical fiber manufacturing device 10 includes a heating furnace 14 (bare optical fiber-forming unit), a cooler 16, a coating unit 18, a resin-curing unit 20, a pulley 22 (first direction-converter)…” the optical fiber production method comprising, guiding the optical fiber by bringing the optical fiber into contact, at only one point, with a bottom roller when viewed in a cross section of the optical fiber in contact with the bottom roller; [0053], FIG. 2, “The pulley 22 is arranged such that its axis of rotation Ax1 and the traveling direction of the optical fiber 32 are skew (in other words, such that they are mutually perpendicular when seen in the perspective view of FIG. 2). The width W of the outer peripheral face 26 of the pulley 22 is approximately 10 mm…”. See Annotated FIG. 2 below: PNG media_image1.png 784 798 media_image1.png Greyscale the bottom roller being provided directly below the drawing furnace and configured to change a running direction of the optical fiber; [0012], lines 6-9, [0055], lines 4-8, [0022], FIG. 8,“a first direction-converter, which is a solid body that comes into contact with the optical fiber outputted from the coating unit and thereby changing its traveling direction”, “the contact angle Ɵ between the optical fiber 32 and the pulley 22 (a roller) , which is the first solid body that changes the traveling direction of the optical fiber 32 after it has been extracted from the resin- curing unit 20, is in the range of about 10.degree. to 80.degree”, “The rotating body (roller) constituting the first direction-converter…”, FIG. 8 illustrates first direction converter pulley 22 aligned directly below the drawing furnace. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTOPHER PAUL DAIGLER whose telephone number is (571)272-1066. The examiner can normally be reached Monday-Friday 7:30-4:30 CT. 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, Alison Hindenlang can be reached on 571-270-7001. 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. /CHRISTOPHER PAUL DAIGLER/ Examiner, Art Unit 1741 /ALISON L HINDENLANG/Supervisory Patent Examiner, Art Unit 1741
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Prosecution Timeline

Jul 11, 2024
Application Filed
Apr 01, 2026
Non-Final Rejection — §102 (current)

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Prosecution Projections

1-2
Expected OA Rounds
56%
Grant Probability
99%
With Interview (+57.1%)
3y 2m
Median Time to Grant
Low
PTA Risk
Based on 9 resolved cases by this examiner. Grant probability derived from career allow rate.

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