Patents by Inventor Hansjurg Hermann

Hansjurg Hermann 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).

  • Liquid developer for color electrophotography and process for preparation of the same
    Patent number: 4155862
    Abstract: Liquid developer formulations adapted to colored toners suitable for trichromatic processes in electrophotography, the toners being lightfast organic dye pigments with substantially no photoconductivity which are mixed with a paraffinic material as a protective polymer (a dispersing liquid being used if the protective polymer is a solid) and suspended in an insulating hydrocarbon carrier medium together with a metal soap and a phenol derivative soluble in the carrier.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: May 22, 1979
    Assignee: Konishiroku Photo Ind. Co., Ltd.
    Inventors: Eugen Mohn, Hansjurg Hermann
  • Process and device for electrophotographic image generation and application of the process
    Patent number: 4093456
    Abstract: Electrophoretic image generation involving a conductivity pattern and a field produced by electrodes which are shunted in the process of image formation, the shunting being interrupted for a predetermined time to minimize background.
    Type: Grant
    Filed: June 11, 1976
    Date of Patent: June 6, 1978
    Assignee: Konishiroku Photo Ind., Ltd.
    Inventor: Hansjurg Hermann