Patents by Inventor Tomoo Saheki

Tomoo Saheki 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).

  • Method of preparing polyvinyl alcohol fibers having improved properties
    Patent number: 3987140
    Abstract: Disclosed is a method for preparing polyvinyl alcohol fibers which comprises spinning an aqueous solution of polyvinyl alcohol containing boric acid or a borate and from about 0.01-5 weight per cent based on said polyvinyl alcohol of an additive comprising an amino acid, an amine, salicylic acid and derivatives thereof or a derivative of pyridine into an alkaline coagulation bath, and subsequently treating the resultant spun fiber by roller drawing, neutralizing with acid, wet hot drawing, washing with water, drying and dry hot drawing.
    Type: Grant
    Filed: April 11, 1973
    Date of Patent: October 19, 1976
    Assignee: Kuraray Co., Ltd.
    Inventors: Akio Mizobe, Tomoo Saheki, Shigekazu Kobayashi