Patents by Inventor Tetsuji Iwama

Tetsuji Iwama 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).

  • Phosphor having surface coated with a quaternary salt-containing compound
    Patent number: 6020067
    Abstract: A phosphor having a surface coated with a metal alkoxide containing a quaternary ammonium salt.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: February 1, 2000
    Assignee: Kasei Optonix, Ltd.
    Inventors: Tetsuji Iwama, Noboru Matsuhisa, Masami Hirono, Masaru Naito, Makoto Hattori
  • Method for manufacturing heat exchange vehicle
    Patent number: 4718482
    Abstract: A method for manufacturing a novel heat exchanging vehicle comprising the steps of forming an inorganic surface layer over a cold rolled, aluminum or aluminum alloy sheet; treating the inorganic surface layer with a phosphoric compound solution; annealing the sheet; and forming the sheet into a predetermined shape. The resulting heat exchanging vehicle such as a fin has a good wettability and a high corrosion resistance to white rust based on the uniformity of the said surface layer.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: January 12, 1988
    Assignee: Mitsubishi Aluminum Kabushiki Kaisha
    Inventors: Tetsuji Iwama, Katashi Katsumata, Hajime Kudo, Yo Takeuchi