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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12780726 B1

PDFFull Text
Date of Patent:
Nov. 03, 2026

Filed:

Dec. 06, 2021

Resin composition, method for producing resin composition, optical fiber, method for producing optical fiber, optical fiber ribbon, and optical fiber cable

Applicant:

Sumitomo Electric Industries, Ltd., Osaka, JP;

Inventor:

Yuya Homma, Osaka, JP;

Assignee:

SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;

Attorney:

Faegre Drinker Biddle & Reath LLP

Primary Examiner:

Jessica Whiteley

Int. Cl.
CPC ...
C08F 2/46 (2006.01); C03C 25/105 (2018.01); C03C 25/1065 (2018.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01);
U.S. Cl.
CPC ...
C03C 25/105 (2013.01); C03C 25/1065 (2013.01); C03C 2218/32 (2013.01);
Abstract

A resin composition for primary coating of an optical fiber contains a photopolymerizable compound containing a difunctional urethane (meth)acrylate and a monofunctional urethane (meth)acrylate, and a photopolymerization initiator, the difunctional urethane (meth)acrylate is a reaction product of a diol, a diisocyanate, and a hydroxyl group-containing (meth)acrylate, and the monofunctional urethane (meth)acrylate is a reaction product of a polyoxyalkylene monoalkyl ether, a diisocyanate, and a hydroxyl group-containing (meth)acrylate, or a reaction product of a polyoxyalkylene monoalkyl ether and an isocyanate group-containing (meth)acrylate.

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Homma, Yuya. (2026). Resin composition, method for producing resin composition, optical fiber, method for producing optical fiber, optical fiber ribbon, and optical fiber cable (U.S. Patent No. 12780726). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12780726

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