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.:
Date of Patent:
Jul. 12, 2011
Filed:
Sep. 08, 2006
Yasuo Nakajima, Tokyo, JP;
Hiroki Tanaka, Tokyo, JP;
Yoshihiro Arashitani, Tokyo, JP;
Kouji Mochizuki, Tokyo, JP;
Mitsunori Okada, Tokyo, JP;
Yasuo Nakajima, Tokyo, JP;
Hiroki Tanaka, Tokyo, JP;
Yoshihiro Arashitani, Tokyo, JP;
Kouji Mochizuki, Tokyo, JP;
Mitsunori Okada, Tokyo, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
The present invention relates to an optical fiber accommodated in an optical fiber cable, and more particularly, to an optical fiber which optimizes optical fiber coating resin and color resin and restrains an increase in transmission loss of the optical fiber due to an operating environment and aged deterioration and provides an optical fiber and optical fiber ribbon without any increase of transmission loss irrespective of the operating environment and aged deterioration, and especially when exposed to water or high humidity. The optical fiber is an optical fiber coated with at least two layers of coating resin, wherein the outermost coated coating resin is a colored layer made of color resin and when the optical fiber is immersed in water which is heated to 60° C. for 168 hours, an extraction rate of the coating resin of the optical fiber is set to 1.5 mass percent or below.