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:
May. 25, 1993
Filed:
May. 02, 1991
Applicant:
Inventors:
Seiji Tai, Hitachi, JP;
Shigeru Hayashida, Hitachi, JP;
Nobuyuki Hayashi, Hitachi, JP;
Hideo Hagiwara, Hitachi, JP;
Mitsuo Katayose, Hitachi, JP;
Koichi Kamijima, Hitachi, JP;
Takayuki Akimoto, Hitachi, JP;
Susumu Era, Hitachi, JP;
Setsuo Kobayashi, Hitachi, JP;
Akio Mukoh, Mito, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558419 ; 546261 ; 546300 ; 549 59 ; 549 65 ; 549472 ; 549479 ;
Abstract
2,3-dicyanonaphthalene derivatives useful in the synthesis of naphthalocyanine derivatives are disclosed. The 2,3-dicyanonaphthalene derivatives have the formula: ##STR1## wherein each R.sup.1 may be the same or different and represents an alkyl group, substituted alkyl group, or aryl group; and n is an integer from 1 to 4.