Patents by Inventor Kesanao Kobayashi

Kesanao Kobayashi 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).

  • Gum removing solution for lithographic plate
    Patent number: 4024085
    Abstract: A gum removing solution for a lithographic plate containing at least one compound selected from the group consisting of compounds containing ##STR1## linkage where M represents a hydrogen atom, an ammonium group or an alkali metal atom and cyclic esters and cyclic amides having 3 to 6 carbon atoms. The solution can further contain at least one compound selected from the group consisting of phosphoric acid and polyphosphoric acid and the metal salts and ammonium salts of these acids, and optionally a water-soluble colloid. The solution has a pH of 1 to 5.5.
    Type: Grant
    Filed: October 3, 1974
    Date of Patent: May 17, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kesanao Kobayashi, Hiroshi Matsumoto