Patents by Inventor Akifumi Katsushima

Akifumi Katsushima 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).

  • Aqueous coating composition and its preparation
    Patent number: 5436307
    Abstract: An aqueous coating composition with excellent adhesion and waterproof properties is prepared by copolymerizing an alkoxysilane compound, a hydrophilic monomer, and a hydrophobic ethylenically unsaturated monomer at a specific ratio in an organic solvent, and then substituting the organic solvent with aqueous medium. The copolymerization reaction is stable, and the aqueous composition, which is a solution or dispersion, does not contain any substances to deteriorate the water resistance of the resulting film.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: July 25, 1995
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventor: Akifumi Katsushima