Patents by Inventor Mikio Hitotsuyanagi

Mikio Hitotsuyanagi 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).

  • Oil-water separation filters
    Patent number: 4212733
    Abstract: An oil-water separation filter, which comprises (1) a porous material comprising a sintered polyethylene powder bonded to (2) a fibrous layer having a thickness of about 0.5 to about 5 mm and a porosity of about 70 to about 90% comprising fibers having a water content of about 0.4 to about 5%, a critical surface tension of about 25 to about 45 dyne/cm and a fiber diameter of about 5 to about 30 .mu. or a mixture of the fibers and fibers having a water content of about 8 to about 15% and a fiber diameter of 5 to about 30 .mu..
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: July 15, 1980
    Assignee: Somar Manufacturing Co., Ltd.
    Inventors: Yuzuru Goto, Yukitaka Daigo, Mikio Hitotsuyanagi