Patents by Inventor Tsugusi Yosida

Tsugusi Yosida 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).

  • Polyamide solution composition and methods for producing fibrids and paper-like sheets using the same
    Patent number: 5723568
    Abstract: A polyamide comprising a solution of (i) an aliphatic polyamide and/or an aliphatic aromatic poly amide dissolved in (ii) N-methyl-2-pyrrolidone and containing (iii) calcium chloride, the ratio between the polyamide (i) and the N-methyl-2-pyrrolidone (ii) in the solution composition being 3 to 25% by weight of the polyamide (i)to 97 to 75% by weight of the N-methyl-2-pyrrolidone, (ii) with the solution also containing calcium chloride (iii) in an amount of 5 to 60 parts by weight based on 100 parts by weight of the polyamide (i) which can be precipitated in a precipitant consisting essentially of water while stirring the precipitant to provide fibrids, which then can be mixed with fibers or natural pulp and formed into synthetic paper.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: March 3, 1998
    Assignee: Teijin Limited
    Inventors: Keizo Shimada, Jiro Sadanobu, Tsugusi Yosida, Yuzo Aito