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. 08, 1992
Filed:
Sep. 05, 1990
Applicant:
Inventors:
Toru Yashiro, Yokosuka, JP;
Yutaka Ueda, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430495 ; 430270 ; 430945 ; 3461351 ;
Abstract
An optical information recording medium comprising a substrate and a recording layer, formed on the substrate, which comprises a composition of antimony, sulfur, and one element selected from the group consisting of the elements belonging to group IIB and group IVA of the periodic table.