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. 05, 1994
Filed:
Apr. 23, 1992
Akio Kojima, Mitaka, JP;
Takeo Yamaguchi, Kamiitabashi, JP;
Masao Yoshikawa, Yokohama, JP;
Isamu Shibata, Fuchu, JP;
Kaoru Teramura, Hino, JP;
Ricoh Company Ltd., Tokyo, JP;
Abstract
A high dielectric polymeric optical recording medium for recording information by heating the portions of the recording medium corresponding to the information to be recorded by being exposed to a beam of light, followed by the application of a reverse electric field to the recording medium, thereby selectively reversing the polarity of the heated portions in the recording medium, is disclosed, which comprises a high dielectric polymeric recording layer containing a high dielectric polymeric composition comprising a high dielectric polymeric material and a nonionic dye serving as a light-absorption agent which is compatible with or dispersible in the high dielectric polymeric material.