Patents by Inventor Yukinori Saiki

Yukinori Saiki 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).

  • Preparing molded articles of fluorine-containing polymer with increased water-repellency
    Patent number: 5599489
    Abstract: A molded article of fluorine-containing polymer, especially of polytetrafluoroethylene, with increased water-repellency, and a jig for holding articles to be washed during washing processes using an aqueous washing medium. The molded article with superior water-repellency can be obtained by a treatment of the surface of fluorine-containing polymer with a fluorine-containing gas after roughening of the surface. The water-repellent jig made of the surface treated polytetrafluoroethylene is suited for use as a carrier for washing semi-conductor wafers and glass plates or guide rolls of a liquid crystal display device.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: February 4, 1997
    Assignees: Onoda Cement Co., Ltd., ASK Corporation
    Inventors: Yukinori Saiki, Mina Ichikawa, Massatsu Shimomura, Masahiro Ono, Nobuatsu Watanabe
  • Method for preparing N-fluoropyridinium salt
    Patent number: 5336772
    Abstract: N-fluoropyridinium salts of the following formula are prepared by reacting a pyridine compound with a Br nsted acid and fluorine, wherein the reaction solvent contains a greater than equimolar amount of the pyridine compound relative to an amount of the Br nsted acid. ##STR1## The method can produce N-fluoropyridinium salts with a high yield.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: August 9, 1994
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Yukinori Saiki, Kazunori Nukui
  • Method of treating fly ash and fly ash cement
    Patent number: 5286292
    Abstract: Commercially available fly ash is prepared and charged in a vessel. A halogen gas is supplied to the vessel and is brought into contact with the fly ash in the vessel.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: February 15, 1994
    Assignee: Onoda Cement Co., Ltd.
    Inventors: Kazuhisa Tsukada, Takeshi Kuroda, Takane Mukaino, Yukinori Saiki