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. 14, 1987
Filed:
Aug. 15, 1985
Applicant:
Inventors:
Masayoshi Hasuo, Yokohama, JP;
Seiichi Mukai, Kunitachi, JP;
Hiroshi Urabe, Kawasaki, JP;
Seiji Yoshida, Kawasaki, JP;
Masahiro Nukui, Sagamihara, JP;
Assignee:
Mitsubishi Chemical Industries Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528204 ; 428412 ; 524611 ; 528196 ;
Abstract
An optical disc substrate made of a polycarbonate containing from 5 to 100% by weight, based on the total carbonate bond-constituting units, of carbonate bond-constituting units having the formula: ##STR1## wherein each of Y and Z is a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 6 carbon atoms, and each of X and W is an aliphatic hydrocarbon group having from 1 to 6 carbon atoms.
Hasuo, Masayoshi. (1987). Optical disc substrate made of a copolycarbonate (U.S. Patent No. 4680374). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4680374
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile