Patents by Inventor Eietsu Toyooka

Eietsu Toyooka 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 polymerizing vinyl chloride with a scale prevention compound coated on a reaction surface
    Patent number: 4555555
    Abstract: A process for polymerizing vinyl chloride is disclosed which comprises coating prior to the polymerization the surfaces of a polymerization reactor, agitator blades and a reflux condenser with a reaction product obtained by the reaction of a phenolic compound and an aromatic aldehyde, said reaction product having an average molecular weight of from 3,000 to 10,000. Not only is the polymer scales formation prevented surprisingly, but a high quality product substantially free from fish eyes is obtained.
    Type: Grant
    Filed: January 17, 1984
    Date of Patent: November 26, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Eietsu Toyooka, Yoshio Tomishima, Yasuhiro Nojima