Patents by Inventor Isamu Maki

Isamu Maki 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).

  • Negatively charged toner for developing electrostatic images containing metal complex of salicyclic acid compound as charge control agent
    Patent number: 4206064
    Abstract: A toner for developing electrostatic images comprises a metal complex of salicylic acid or a metal complex of an alkyl salicylic acid as a charge controlling agent.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: June 3, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Kiuchi, Isamu Maki
  • Liquid developer for electrostatic image
    Patent number: 3993483
    Abstract: Liquid developers for use in developing electrostatic latent image which contain at least one member selected from the following Group A and at least one member selected from the following Group B.Group A: Cumarone indene resin, rosin modified phenol resin, rosin modified maleic acid resin, rosin modified pentaerythritol resin, alkylphenol modified xylene resin, styrene-vinyltoluene copolymer, and resin acid calcium salt.Group B: Low molecular polyethylene, ethylene-ethylacrylate copolymer, ethylene-vinylacetate copolymer, low molecular polypropylene, chlorinated paraffin (degree of chlorination, 40 to 70%), polybutene resin, .beta.-pinene resin, polyterpene resin, and alkylphenol formaldehyde resin.
    Type: Grant
    Filed: January 22, 1974
    Date of Patent: November 23, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isamu Maki, Masashi Kiuchi, Toshio Watanabe, Saburo Shoji, Mitsuo Sato, Tatsuyoshi Kanai, Toshiyuki Komatsu