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:
Jun. 04, 1991
Filed:
Jun. 19, 1989
Applicant:
Inventors:
Hisamitsu Kamezaki, Ibaraki, JP;
Masashi Suenaga, Ibaraki, JP;
Osamu Saito, Takatsuki, JP;
Shin-ichiro Iuchi, Ibaraki, JP;
Hitoshi Watanabe, Ibaraki, JP;
Hideo Fujiwara, Ibaraki, JP;
Yoshitane Tuburaya, Toride, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428412 ; 428522 ; 428913 ; 346 / ; 3461351 ; 369288 ;
Abstract
An optical data recording medium having a recording layer with or without an underlayer layered on a transparent substrate, wherein said recording layer is composed of a difficult-to-dissolve-in-water organic dye type material on which a thin layer composed of a surface active polymer as a hydrophilic material, which is denaturated by cross-linking.