Patents by Inventor Shojiro Itoh

Shojiro Itoh 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).

  • Vinyl chloride plastisol compositions
    Patent number: 4429071
    Abstract: A vinyl chloride plastisol composition comprises 100 parts by weight of a vinyl chloride paste resin and 35 to 180 parts by weight of a plasticizer the vinyl chloride paste resin having an average particle size of 0.5 to 10 microns, and being composed of 5 to 80% by weight of tetrahydrofuran-insoluble micro-gel fraction and 20 to 95% by weight of tetrahydrofuran-soluble fraction.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: January 31, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shojiro Itoh, Masayuki Murashige, Toshio Igarashi
  • Process for preparation of aromatic acyl chloride
    Patent number: 4167525
    Abstract: An aromatic acyl chloride is obtained with industrial advantages by reacting an aromatic carboxylic acid, phosphorus trichloride and chlorine, treating the reaction mixture comprising by-produced phosphorus pentachloride with at least one treating agent selected from water and phosphorus compounds to convert the phosphorus pentachloride into phosphorus oxychloride, and then subjecting the resulting reaction mixture to distillation to obtain the desired aromatic acyl chloride.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: September 11, 1979
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yushin Kataoka, Shojiro Itoh, Masahiro Niwano