Patents by Inventor Kenichi Sawada

Kenichi Sawada 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).

  • Method of providing an electrophotographic coating and compositions for the method
    Patent number: 3944682
    Abstract: A method of forming an electrophotographic coating which includes preparing a mixture which comprises finely divided photoconductive material dispersed in an organic resin binder. The resin, which exhibits an acid value of at least 3, or a hydroxyl value of at least 15, is heat-treated for a time and temperature enclosed within the area ABCDEFGH of the temperature-treating diagram shown in the accompanying drawing. Following this treatment, the mixture is dissolved in a volatile solvent for the binder resin, and the dispersion is coated onto a conductive backing to form a substantially uniform layer.
    Type: Grant
    Filed: November 14, 1973
    Date of Patent: March 16, 1976
    Assignee: Rank Xerox, Ltd.
    Inventors: Hajime Miyatsuka, Satoru Honjo, Kenichi Sawada, Takashi Saida