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:
Dec. 26, 1989
Filed:
Nov. 04, 1986
Shinichi Teshima, Yokohama, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A plastic optical fiber comprising a polymer core constituted mainly of methyl methacrylate and a polymer cladding having a lower refractive index than that of the core, characterized in that the core consists of a methyl methacrylate homopolymer or a copolymer constituted of at least 95% by weight of methyl methacrylate and less than 5% by weight of (i) methyl acrylate, (ii) ethyl acrylate, or (iii) a mixture of both acrylates, that the weight-average molecular weight of the core polymer is from 80,000 to 200,000, and that light attenuations through the fiber are up to 250, 130, 80, and 130 dB/Km at wavelengths of 400, 450, 570, and 650 nm, respectively, and a process for producing the same.