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. 22, 1991
Filed:
Nov. 13, 1989
Narihito Kojima, Numazu, JP;
Hiroshi Nagame, Numazu, JP;
Mitsuru Seto, Yamakita, JP;
Shunpei Yamazaki, Atsugi, JP;
Shigenori Hayashi, Atsugi, JP;
Noriya Ishida, Atsugi, JP;
Naoki Hirose, Atsugi, JP;
Mari Sasaki, Atsugi, JP;
Junichi Takeyama, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Semiconductor Energy Laboratory Company Co., Ltd., Atsugi, JP;
Abstract
An electrophotographic photoconductor comprises an electroconductive substrate, an organic photoconductive layer formed on the electroconductive substrate, and a protective layer formed on the organic photoconductive layer, comprising carbon or a carbon-based material as its main component, in which the difference in the Vickers hardness between the organic photoconductive layer and the protective layer is 2500 Kg/mm.sup.2 or less, and the oxygen concentration at the interface or in the vicinity of the interface between the organic photoconductive layer and the protective layer is 1 atom % or less.