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:
Jun. 04, 1985
Filed:
Jun. 17, 1981
Seiitj Sakuma, Tokyo, JP;
Shuichi Karasawa, Kokubunji, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A composite photosensitive material for use in electrophotography which comprises a conductive substrate on which there is laminated a first photoconductive layer having a sensitivity to at least a part (Light A) of the chromatic light of visible light region and a second photoconductive layer capable of transmitting said Light A as well as having a sensitivity to another chromatic light (Light B), characterized in that said photoconductive layers are each capable of holding the electric charge of a polarity opposite to each other and additionally accepting as well as retaining a surface potential enough to develop an electrostatic latent image, which is formed by said electric charge, with a toner.