Patents by Inventor Katushi Hamada

Katushi Hamada 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).

  • Fluorocarbon filter element
    Patent number: 4663041
    Abstract: The present invention provides a filter element made wholly of fluorocarbon resin, including as essential elements a filter material produced by folding a sandwich-form sheet comprising a filter membrane made of a fluorocarbon resin and net supporters made of a thermoplastic fluorocarbon resin superimposed on the both surfaces thereof into a pleat form and liquid-tightly welding the edge parts of the both sides of the pleated sheet, sealed end parts produced by embedding the both end parts of said filter material except the central openings into a thermoplastic fluorocarbon resin to force the resin into the pleats, whereby the both end parts are each integrally and tightly welded, and fluorocarbon resin caps welded liquid-tightly with said sealed end parts, and production thereof.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: May 5, 1987
    Assignee: Kurashiki Baseki Kabushiki Kaisha
    Inventors: Tokuya Miyagi, Akihisa Inoue, Katushi Hamada, Shoichi Fujimori, Yoshihiro Hori
  • Method of producing a fluorocarbon filter element
    Patent number: 4588464
    Abstract: The present invention provides a filter element made wholly of fluorocarbons resin, comprising as essential elements a filter material produced by folding a sandwich-form sheet comprising a filter membrane made of a fluorocarbon resin and net supporters made of a thermoplastic fluorocarbon resin superimposed on the both surfaces thereof into a pleat form and liquid-tightly welding the edge parts of the both sides of the pleated sheet, sealed end parts produced by embedding the both end parts of said filter material except the central openings into a thermoplastic fluorocarbon resin to force the resin into the pleats, whereby the both end parts are each integrally and tightly welded, and fluorocarbon resin caps welded liquid-tightly with said sealed end parts, and production thereof.
    Type: Grant
    Filed: May 8, 1984
    Date of Patent: May 13, 1986
    Assignee: Kurashiki Boseki Kabushiki Kaisha
    Inventors: Tokuya Miyagi, Akihisa Inoue, Katushi Hamada, Shoichi Fujimori, Yoshihiro Hori