Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Electrophotographic photoconductor
 An electrophotographic photoconductor composed of an electroconductive support and a photoconductive layer formed thereon, which contains a charge generating material, a binder resin including a butyral resin containing a polyvinyl butyral resin component at a molar ratio of 68 mol % or more, a charge transporting material, and biphenyl or a biphenyl derivative. 
Ricoh Company, Ltd.
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Yasuo Satoshi
Suzuki Igari