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:
Nov. 05, 1991
Filed:
Jun. 07, 1990
Applicant:
Inventors:
Assignee:
Nippon Zeon Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
421 64 ; 428 65 ; 4284111 ; 428457 ; 428461 ; 428913 ; 369284 ; 369286 ; 369288 ; 346766 ; 3461351 ; 430945 ;
Abstract
There is disclosed an optical disk having an optical reflectivity of 70% or above which comprises a substrate made of a thermoplastic saturated norbornene type polymer having a glass transition temperature of 100.degree. C. or above and a light reflecting layer formed by laminating, on said substrate, a multi-layer film constituted of at least one compound selected from the group consisting of metallic oxides and metallic fluorides.