Patents by Inventor Masahiro Sogo

Masahiro Sogo 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).

  • Silicon-containing block copolymer
    Patent number: 5760136
    Abstract: A block copolymer comprising siloxane segments, amphoteric monomer units and/or cationic nonomer units, and if necessary monomer units of precursors thereof, and nonionic monomer units, obtained by polymerization in the presence of a special azo group-containing polysiloxane compound is useful as paint resins, coating resins and base materials for hair cosmetics.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: June 2, 1998
    Assignee: Wako Pure Chemical Industries, Ltd.
    Inventors: Kazuhiro Kato, Kazushige Muto, Masahiro Sogo