Patents by Inventor Yuichiro Sudo

Yuichiro Sudo 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).

  • Seamless copper alloy tube for heat exchanger being excellent in 0.2% proof stress and fatigue strength
    Patent number: 6280541
    Abstract: A seamless pipe made of copper alloy consisting of, by weight % , a total amount of 0.02 to 0.2% of Co, 0.01 to 0.05% of P, 1 to 20 ppm of C if needed, and remainder Cu, and unavoidable impurities and, as said impurities, the total oxygen content is regulated to 50 ppm or less, and useful for a heat transfer pipe of a heat exchanger and especially, when HFC-type fluorocarbon is used as a heating medium.
    Type: Grant
    Filed: April 4, 2000
    Date of Patent: August 28, 2001
    Assignee: Mitsubishi Materials Corporation
    Inventors: Yuichiro Sudo, Tetsuo Yamaji, Yutaka Saito