US 7,267,915 : Photoconductive element having an amorphous polymeric barrier layer

Molaire, Michel F. (Rochester, NY, US)
Ferrar, Wayne T. (Fairport, NY, US)
Molaire, Tulienne R. (Rochester, NY, US) 
Eastman Kodak Company (Rochester, NY, US) 

This invention relates to electrophotography and to amorphous condensation polymers comprising a polyester-co-imide, polyester-co-imide, polyesterionomer-co-imide, or polyamide-co-imide as a polymeric electrical charge barrier layer.