Patents by Inventor Sinichi Sato

Sinichi Sato 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).

  • Charge controlling agent composition and toner containing said composition
    Patent number: 5645967
    Abstract: The present invention relates to a toner for electrophotography, and an object of the present invention is to improve various characteristics of the toner for electrophotography. A charge controlling agent composition obtained either by adding carbon therein during the preparation of the charge controlling agent or by mixing the charge controlling agent with carbon in the presence of a solvent, and an electro-photographic toner containing said composition are provided. The charge controlling agent composition wherein the charge controlling agent and carbon are uniformly dispersed, has excellent dispersibility in the resin, is freed from the problems of charging unstableness and scattering, and can provide an electro-photographic toner which provides a clear copied image.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: July 8, 1997
    Assignee: Hodogaya Chemical Company Limited
    Inventors: Sinichi Sato, Nobuo Suzuki, Hiroyoshi Yamaga, Sigeo Hosaka
  • Process for producing 2,6-dichlorobenzyl alcohol
    Patent number: 4822924
    Abstract: A process for producing 2,6-dichlorobenzyl alcohol, which comprises reacting 2,6-dichlorobenzyl chloride with an acetate-forming agent to form its acetate, followed by hydrolysis to obtain 2,6-dichlorobenzyl alcohol, wherein anhydrous sodium acetate is used as the acetate-forming agent, and a quaternary ammonium salt is added as a phase transfer catalyst during the acetate-forming reaction.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: April 18, 1989
    Assignee: Hodogaya Chemical Co., Ltd.
    Inventors: Ichiro Otsu, Sueo Kanno, Sinichi Sato, Tetsuya Kondo