Patents by Inventor Shinpachiro Iwaki

Shinpachiro Iwaki 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).

  • Process for separation and purification of vinylphenol
    Patent number: 4101590
    Abstract: A process for the separation and purification of vinylphenol which comprises contacting crude vinylphenol containing vinylphenol and impurities such as phenol, alkylphenols, vinylphenol polymers and hydrocarbons countercurrently with an aqueous alkali solution together with a specific organic solvent.Vinylphenol obtained is useful as the raw material for the production of polyvinylphenol or a vinylphenol copolymer which is utilized as a thermoplastic resin, an ion exchange membrane, an adhesive, a glass fiber-reinforced composite or the like.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: July 18, 1978
    Assignee: Maruzen Oil Co., Ltd.
    Inventors: Mikio Sato, Kinya Tawara, Shinpachiro Iwaki, Kohji Matsumoto, Kenichi Sekine