Patents by Inventor Graham Charnock

Graham Charnock has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photoconductive compositions sensitive to both laser light and tungsten halide light
    Patent number: 4565757
    Abstract: A photoconductive composition comprises a photoconductor and a sensitizer. The sensitizer has the formula ##STR1## wherein R represents alkyl; R1 represents H, alkyl or aryl; R2 represents the atoms required to complete a hetero or carboxyclic ring; A.sup.- represents an anion; and n represents the valency of the anion. The composition is sensitive to both laser light sources and tungsten light sources and is useful in electrophotographic reproduction.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: January 21, 1986
    Assignee: Vickers PLC
    Inventors: Anthony J. Chalk, Graham Charnock, Allen P. Gates, David E. Murray, Ian S. Smith