Patents by Inventor Tsunemitsu Hasegawa

Tsunemitsu Hasegawa 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).

  • Process for producing porous film or sheet
    Patent number: 4472328
    Abstract: A process for producing a porous film or sheet, which comprises melt-molding a composition prepared by compounding 100 parts by weight of a polyolefin resin with 25 to 400 parts by weight of a filler and 1 to 100 parts by weight of a liquid or waxy hydrocarbon polymer into film or sheet, and stretching the resulting film or sheet.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: September 18, 1984
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Masaaki Sugimoto, Yukio Watanabe, Kunio Bizen, Tsunemitsu Hasegawa, Masahiro Morita