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:
May. 19, 1987
Filed:
Jan. 24, 1986
Wolfgang Wiedemann, Geisenheim-Johannisberg, DE;
Dieter Guenther, Kelkheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The photoconductor of an electrophotographic recording material comprising an electrically conductive support, an optional insulating interlayer, and a photoconductive single layer containing a binder, a dye or pigment sensitizer and a pyrimido[5',4':5,6]pyrido[1,2-a]benzimidazole charge transporting compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and are hydrogen or an R.sub.3,R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and are (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, phenyl or benzyl which are unsubstituted or (C.sub.1 to C.sub.4)-alkyl-substituted, or, together with the N atom to which they are bonded, are an imidazolyl or triazolyl group; and R.sub.5 is a benzothiazole, a benzoxazole or a benzimidazole group, is photosensitive in the visible range around 430 to 500 nm and can be sensitized for the longer-wavelength region with dyes.