Patents by Inventor Waichiro Tsuji

Waichiro Tsuji 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).

  • Polyelectrolyte composite of polyvinyl alcohol derivatives
    Patent number: 3959406
    Abstract: A polyelectrolyte composite of polyvinyl alcohol derivatives; which comprises: an ionically bonded composite of a partial acetal of polyvinyl alcohol modified with diethoxyethyl trimethyl ammonium ion or a partial aminoacetal of polyvinyl alcohol modified with aminoacetal, with a carboxymethyl polyvinyl alcohol or a partial sulfate of polyvinyl alcohol.
    Type: Grant
    Filed: February 15, 1974
    Date of Patent: May 25, 1976
    Assignee: Kyoto University
    Inventors: Waichiro Tsuji, Akio Nakajima, Masao Hosono