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:
Jan. 16, 1996
Filed:
May. 30, 1991
Applicant:
Inventors:
Seiji Tai, Palo Alto, CA (US);
Nobuyuki Hayashi, Hitachi, JP;
Koichi Kamijima, Hitachi, JP;
Mitsuo Katayose, Hitachi, JP;
Takayuki Akimoto, Hitachi, JP;
Shigeru Hayashida, Hitachi, JP;
Hideo Hagiwara, Hitachi, JP;
Susumu Era, Ichihara, JP;
Setsuo Kobayashi, Hitachi, JP;
Akio Mukoh, Mito, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G11B / ; C09B / ;
U.S. Cl.
CPC ...
540452 ; 430495 ; 430945 ; 43027017 ; 540128 ; 540131 ; 540139 ; 540142 ;
Abstract
A naphthalocyanine derivative of the formula: ##STR1## wherein M, Y, R.sup.1, k, l, m, n are as defined in the specification, is an effective substance for forming a recording layer on a substrate of an optical recording medium having high sensitivity with good properties.