Patents by Inventor Yuichiro Yamada

Yuichiro Yamada 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).

  • Aluminum heat exchanger
    Patent number: 4368776
    Abstract: An aluminum heat exchanger with excellent corrosion resistance and particularly suited for adaptation as radiator for automobiles, the heat exchanger having a 2- or 3-layer coating film structure consisting of a zinc-diffused layer formed on the surface of an aluminum base and a waterproof organic film formed on the zinc-diffused layer with or without a phosphoric acid-chromate coating therebetween, whereby the surface of the aluminum base is not directly contacted with at least the water-containing heat exchange medium is provided.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: January 18, 1983
    Assignees: Nippondenso Co., Ltd., Nihon Pakerizing Co., Ltd.
    Inventors: Junichi Negita, Yuichiro Yamada, Hideaki Kaneko, Takao Ogino