Keil & Witherspoon
Electrophotographic medium with perylene-3,4,9,10-tetracarboxylic acid N,N'-bis-(2',6'-dichlorophenyl)-diimide
 An electrophotographic recording medium which consists essentially of an electrically conductive base and a photosemiconductive double layer which comprises a first layer containing charge carrier-producing dyes, and a second layer containing one or more compounds which are charge carrier-transporting when exposed to light, wherein perylene-3,4,9,10-tetracarboxylic acid N,N'-bis-(2',6'-dichlorophenyl)-diimide is employed as the charge carrier-producing dye, and the production of this recording medium. 
BASF Aktiengesellschaft
G C G G
G03G C09B G03G G03G
inventional inventional inventional inventional
Peter Fritz Reinhold J. Gerhard
Neumann Graser Leyrer Hoffmann