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. 18, 1990
Filed:
Jul. 27, 1988
Applicant:
Inventors:
Tatsuya Kanno, Himeji, JP;
Ikuo Takahashi, Himeji, JP;
Kenichi Sasaki, Himeji, JP;
Yoshiro Iguchi, Tatsuno, JP;
Yutaka Fukuda, Himeji, JP;
Assignee:
Daicel Chemical Industries, Ltd., Sakai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; C08G / ;
U.S. Cl.
CPC ...
428412 ; 428913 ; 528204 ; 365126 ;
Abstract
An optical disk of the invention comprises a substrate of an aromatic polycarbonate obtained by polymerizing one or two monomers polymerized through carbonate linkages and a recording layer coated thereon, said recording layer being recordable and readable by a laser beam,