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:
Mar. 26, 1991
Filed:
Jun. 14, 1989
Masaakira Umehara, Yokohama, JP;
Tsutomu Satoh, Yokohama, JP;
Hideaki Ohba, Yokohama, JP;
Keiko Ichinose, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical information recording medium comprising a substrate; a recording layer comprising as the main component an organic dye component, formed on the substrate, which recording layer has a maximum peak in the spectroscopic reflectance thereof near the wavelength of the information recording and reproduction light, and has a thickness at which the spectroscopic reflectance thereof is maximized at the wavelength of the information recording and reproduction light, and an optical information recording method, and a system for recording and/or reproducing information using this recording medium are disclosed.