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. 29, 2013
Filed:
Nov. 25, 2009
Hiromi Tada, Shizuoka-ken, JP;
Naohiro Toda, Kanagawa-ken, JP;
Yuuji Tanaka, Shizuoka-ken, JP;
Norio Nagayama, Shizuoka-ken, JP;
Yoshinori Inaba, Kanagawa-ken, JP;
Takafumi Iwamoto, Shizuoka-ken, JP;
Hiromi Tada, Shizuoka-ken, JP;
Naohiro Toda, Kanagawa-ken, JP;
Yuuji Tanaka, Shizuoka-ken, JP;
Norio Nagayama, Shizuoka-ken, JP;
Yoshinori Inaba, Kanagawa-ken, JP;
Takafumi Iwamoto, Shizuoka-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrophotographic photoreceptor, including a charge generation layer and a charge transport layer on an electroconductive substrate, wherein the charge generation layer includes titanylphthalocyanine and a binder resin which is a crosslinked material of a resin comprising a polyvinylbutyrat site having the following formula (1) and an isocyanate compound having the following formula (2): wherein R1 and R2 independently represent an alkyl group having 1 to 3 carbon atoms; k, l, m and n represent composition ratios and k+1 is from 0.60 to 0.80, wherein k or 1 may be 0, m is from 0.02 to 0.03, and n is from 0.20 to 0.40; wherein A represents a substituted or unsubstituted organic group having 2 to 4 valences; and O represents an integer of from 2 to 4.