Patents by Inventor Yokichi Sato

Yokichi Sato 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).

  • Composition and process for treating magnesium-containing metals and product therefrom
    Patent number: 5900074
    Abstract: The formation on the surface of Mg-containing metal of a highly corrosion-resistant, highly rust-inhibiting, and strongly paint-adherent conversion coating, using a chromic acid free treatment bath, is achieved by treatment with a pH 2.0-5.0 aqueous bath that contains phosphoric acid, manganese ion, and amine, thereby forming a conversion coating that contains P--Mn and Mn--N and/or other nitrogen compounds.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: May 4, 1999
    Assignee: Henkel Corporation
    Inventors: Sadao Ishizaki, Masahiko Nishida, Yokichi Sato
  • Composition and process for treating magnesium-containing metals and product therefrom
    Patent number: 5645650
    Abstract: The present invention produces a highly corrosion-resistant, highly rust-inhibiting, and strongly paint-adherent conversion coating on the surface of magnesium-containing metals, and does so rapidly and at relatively low temperatures, using a substantially chromium-free conversion treatment bath.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: July 8, 1997
    Assignee: Henkel Corporation
    Inventors: Sadao Ishizaki, Masahiko Nishida, Yokichi Sato
  • Heat exchanger
    Patent number: 5203402
    Abstract: A heat exchanger having outer surfaces thereof coated with a hydrophilic coating layer. The hydrophilic coating layer essentially consists of a resin as a base, containing a colloidal silica. In the hydrophilic coating layer, part of silanol groups of the colloidal silica are chemically combined with part of hydroxyl groups of the resin. Due to this chemical combination, the colloidal silica undergoes change in its properties such that it has degraded adsorptivity, making smells less liable to attach to the colloidal silica.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: April 20, 1993
    Assignees: Zexel Corporation, Nihon Parkerizing Co., Ltd.
    Inventors: Kunihiko Nishishita, Amane Watanabe, Isamu Kurosawa, Yokichi Sato
  • Process for controlling zinc phosphate treating solutions
    Patent number: 4612060
    Abstract: A process for controlling the zinc or zinc and nickel content of a zinc phosphate conversion coating solution employs the addition of EDTA and titration with calcium ion using a calcium ion electrode. Preferably to a second sample is added EDTA and a thioglycolate and the same titration conducted to obtain the concentration of nickel ion for direct control purposes.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: September 16, 1986
    Assignee: Parker Chemical Company
    Inventors: Ryuiji Kojima, Naomi Suzuki, Yokichi Sato, Tsuneo Saito
  • One side surface molten metallic coating apparatus
    Patent number: 4246865
    Abstract: One side surface of a strip of metal is contacted with a surface of a molten metal bath which is locally raised under ultrasonic vibration whereby a continuous coating is attained on one side only.A tool for imparting the ultrasonic vibration to a bath is immersed near the bath surface and the ultrasonic vibrator connected to the tool is contained in hollow holding means dipped in the bath.In accordance with the apparatus of the present invention, the worn tool can be exchanged for a short time and the molten metallic coating on one side only of the strip of metal can be attained for a long time.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: January 27, 1981
    Assignees: Asahi Glass Company Limited, Nihon Parkerizing Co., Ltd.
    Inventors: Shoji Shimada, Yasunobu Matsushima, Yokichi Sato, Kuniharu Matsumoto, Kazuyuki Akeyoshi, Takayuki Tobita