Patents by Inventor Yoshiaki Saitow

Yoshiaki Saitow 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).

  • Continuous process for producing long .alpha.-alumina fibers
    Patent number: 4812271
    Abstract: Disclosed is a process for continuously producing highly flexible long .alpha.-alumina fibers of small diameter according to the slurry spinning technique. Also disclosed are a specific spinnable slurry containing an alumina powder having an average particles diameter of 0.1 .mu.m or less, the specific thermophysical conditions under which the slurry is spun into a multifilament yarn, and the well-balanced residence time conditions under which the multifilament yarn running as a single continuous fiber is prefired and fired to form a long .alpha.-alumina fiber.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: March 14, 1989
    Assignee: Mitsui Mining Company, Limited
    Inventors: Keiichiro Koba, Taizo Utsunomiya, Yoshiaki Saitow, Katsusuke Iwanaga, Michihiko Matsue, Noriaki Nishitani