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 7153570 B1

PDF
Full Text
Expired
Date of Patent:
Dec. 26, 2006

Filed:

Nov. 15, 2004
Applicants:

Fuminori Nakajima, Tokyo, JP;

Nobuhisa Ishii, Tokyo, JP;

Masao Tachikura, Tokyo, JP;

Shigenori Uruno, Tokyo, JP;

Hisashi Izumita, Tokyo, JP;

Hitoshi Ishimaru, Yamato, JP;

Kuniaki Yamaguchi, Yamato, JP;

Inventors:

Fuminori Nakajima, Tokyo, JP;

Nobuhisa Ishii, Tokyo, JP;

Masao Tachikura, Tokyo, JP;

Shigenori Uruno, Tokyo, JP;

Hisashi Izumita, Tokyo, JP;

Hitoshi Ishimaru, Yamato, JP;

Kuniaki Yamaguchi, Yamato, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/44 (2006.01);
U.S. Cl.
CPC ...
Abstract

An optical fiber cord which is a single core optical fiber cord having an outer diameter of 1.2 mm or less, and has a structure in which an optical fiber core wire having a resin coating is provided at the center, a tensile-strength-fiber layer is provided around the outer periphery of the optical fiber core wire, and a coating layer is further provided around the outer periphery of the tensile-strength-fiber layer, wherein the coating layer is composed of a non-halogen fire-retardant resin, is disclosed. This optical fiber cord has excellent fire retardant, mechanical and handling properties, although the outer diameter thereof is made smaller.


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