Patents by Inventor Katsuhiro Shishikura

Katsuhiro Shishikura 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).

  • Wound non-woven fabric filter having heat fusible fibers
    Patent number: 5728299
    Abstract: The cartridge filter of the present invention is a filter comprising a wound and laminated composite non-woven fabric containing heat fusible fibers, wherein the delamination strength between layers of the laminated composite non-woven fabric of said filter increases continuously or discontinuously from the outer layer toward the inner layer, the delamination strength of the inner layer-exceeds 1000 gf/5 cm, and the delamination strength of the outer layer is 5 to 1000 gf/5 cm. This cartridge excels in filtering life, filtering accuracy, and pressure resistance.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: March 17, 1998
    Assignee: Chisso Corporation
    Inventors: Shinichi Tokudome, Satoshi Ogata, Katsuhiro Shishikura