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:
Oct. 19, 1976
Filed:
Sep. 13, 1974
Applicant:
Inventor:
Mitsuru Hashimoto, Tokyo, JA;
Assignee:
Kabushiki Kaisha Ricoh, Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ;
Abstract
Electrophotographic light-sensitive materials having a photoconductive layer formed on an electroconductive support, the photoconductive layer comprising an organic photoconductive compound (monomer or polymer) and 4-dicyanomethylene-4H-indeno[1,2-b]thiophene or 8-dicyanomethylene-8H-indeno[2,1-b]thiophene or their derivatives as sensitizers, and processes for preparing such compounds from 4H-indeno[1,2-b]thiophen-4-one or 8H-indeno[2,1-b]thiophen-8-one or their derivatives and malonitrile.