Patents by Inventor Masaaki Kasi

Masaaki Kasi 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).

  • Patent number: 4772440
    Abstract: In a method for the manufacture of a porous membrane by the steps of causing a polymer solution to flow and spread in a uniform thickness on a substrate and solidifying the formed layer of the polymer solution in a bad solvent, the improvement which comprises using a fluorinated hydrocarbon as the bad solvent and optionally carrying out the removal of a good solvent mingling into the fluorinated hydrocarbon during the course of the solidification by the technique of extraction from water, and repeating the fluorinated hydrocarbon.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: September 20, 1988
    Assignee: Terumo Kabushiki Kaisha T/A Terumo Corp.
    Inventors: Masaaki Kasi, Noriyuki Koyama