Patents by Inventor Tohsaku Takamura

Tohsaku Takamura 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).

  • Ferritic stainless steel for heat exchanger
    Patent number: 5512239
    Abstract: A ferritic stainless steel comprises C: not more than 0.025 wt %, Si: not more than 0.10 wt %, Mn: not more than 1.0 wt %, Cr: 17.0-25.0 wt %, Ni: not more than 0.50 wt %, Mo: 0.50-2.00 wt %, Al: not more than 0.025 wt %, N: not more than 0.025 wt %, at least one of Nb: 10(C wt %+N wt %)-1.0 wt % and Ti: 10(C wt %+N wt %)-1.0 wt %, and the balance being substantially Fe and inevitable impurities and is effectively used in various heat exchangers.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: April 30, 1996
    Assignees: Tokyo Radiator Mfg. Co., Ltd, Nippon Yakin Kogyo Co. Ltd., Nissan Motor Co., Ltd.
    Inventors: Yoshito Fujiwara, Yutaka Kobayashi, Mituo Kimura, Masatoshi Iio, Tohsaku Takamura