Patents by Inventor Takashi Hirohata

Takashi Hirohata 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 and composition for coating metals
    Patent number: 4411937
    Abstract: Method and composition for applying an organic coating to a metallic surface, the surface being contacted with an acidic aqueous coating composition comprising an organic coating-forming material, fluoride, and ferric iron, wherein the thickness and/or weight of the coating formed on the surface can be controlled by varying the time the surface is immersed in the composition.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: October 25, 1983
    Assignee: Amchem Products, Inc.
    Inventors: Takao Nishida, Takashi Hirohata
  • Process and composition for coating metals
    Patent number: 4347172
    Abstract: Method and composition for applying an organic coating to a metallic surface, the surface being contacted with an acidic aqueous coating composition comprising an organic coating-forming material, fluoride, and ferric iron, wherein the thickness and/or weight of the coating formed on the surface can be controlled by varying the time the surface is immersed in the composition.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: August 31, 1982
    Assignee: Amchem Products, Inc.
    Inventors: Takao Nishida, Takashi Hirohata