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:
Dec. 30, 1980
Filed:
Nov. 20, 1978
Applicant:
Inventors:
Masaomi Sasaki, Kawasaki, JP;
Kiyoshi Sakai, Tokyo, JP;
Mitsuru Hashimoto, Hino, JP;
Masafumi Ohta, Yokohama, JP;
Akio Kozima, Yokohama, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C09B / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
260160 ; 260141 ; 260152 ; 260164 ; 260188 ; 430 72 ; 430 73 ; 430 76 ;
Abstract
The present invention provides disazo compounds expressed by the general formula I ##STR1## wherein A represents ##STR2## in which R represents alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, n is 0 or an integer of 1, 2 or 3, and R may be either identical or different when n is an integer of 2 or 3. The disazo compounds are useful as photoconductive substances or charge-carrier generating substances in various kinds of electrophotographic elements.