Patents by Inventor Junsei Kawahuti

Junsei Kawahuti 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).

  • Recovery of vinyl chloride resin with aid of screen
    Patent number: 4803260
    Abstract: A recovery method of vinyl chloride resin which comprises formulating an aggregate of vinyl chloride resin by adding to an aqueous dispersion of vinyl chloride resin an organic liquid which is difficultly soluble in water and does not dissolve or swell vinyl chloride resin and mixing the two; dehydrating the aggregate; and drying the same to recover granular vinyl chloride resin, the characteristic feature residing in that said aqueous dispersion is the one which has passed through the screen of 20 to 150-micron meshes.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: February 7, 1989
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Masaaki Nishina, Junsei Kawahuti