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:
Aug. 19, 1997
Filed:
Oct. 13, 1995
Keisuke Takuma, Kanagawa-ken, JP;
Tsutami Misawa, Kanagawa-ken, JP;
Masatoshi Yanagimachi, Chiba-ken, JP;
Hideki Umehara, Kanagawa-ken, JP;
Yoshiteru Taniguchi, Kanagawa-ken, JP;
Sumio Hirose, Kanagawa-ken, JP;
Mitsui Toatsu Chemicals, Inc., Tokyo, JP;
Abstract
An optical recording medium has a recording layer, a reflective layer and a protective layer, all of which are arranged on a substrate. The recording layer contains a porphyrin compound represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.8 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylthio group or a halogen atom, R.sub.9 to R.sub.12 independently represent a hydrogen atom or an alkyl group, and X.sup.- represents an anion.