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:
May. 30, 1989
Filed:
Mar. 27, 1987
Applicant:
Inventors:
Ryoichi Sudo, Yokosuka, JP;
Hiroaki Miwa, Fujisawa, JP;
Tetsuo Tajima, Fujisawa, JP;
Shinkichi Horigome, Tachikawa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; G03C / ; G11B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428913 ; 430271 ; 430321 ; 430285 ; 430288 ; 430945 ; 369288 ; 346 / ; 3461351 ;
Abstract
An optical disc wherein a transparent base plate is made from a special light-curable resin composition comprising at least one compound of the formula: ##STR1## wherein R.sub.1 =H or methyl and n=0-5, and a photopolymerization initiator, is excellent in heat resistance, mechanical strength, moisture resistance, etc.