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:
Oct. 12, 1993
Filed:
May. 01, 1991
Applicant:
Inventors:
Toru Yashiro, Yokosuka, JP;
Yutaka Ueda, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428 76 ; 428457 ; 428332 ; 428913 ; 369288 ; 3461351 ; 346 / ; 430945 ;
Abstract
An optical information recording medium is composed of a substrate and a recording layer which is formed on the substrate and made of a composition comprising at least gold and sulfur, with the gold content being 50 atomic percent or more in the composition.