Patents by Inventor Tutomu Nozawa

Tutomu Nozawa 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).

  • Patent number: 4278820
    Abstract: A monoalkylene glycol monoether is produced with good efficiency and commercial advantage by reacting an alkylene oxide with an alcohol in the presence of a solid catalyst resulting from the exchange of exchangeable cations of a montmorillonite clay with a cation of Al, Cr, Mn, Fe, Sn or Th.
    Type: Grant
    Filed: October 3, 1979
    Date of Patent: July 14, 1981
    Assignee: Showa Denka K.K.
    Inventors: Norio Kametaka, Kuniomi Marumo, Tutomu Nozawa