Patents by Inventor Tadashi Kitudo

Tadashi Kitudo 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).

  • High manganese cast iron containing spheroidal vanadium carbide and method for making therof
    Patent number: 6908589
    Abstract: The purpose of the present invention is to provide high manganese cast iron containing spheroidal vanadium carbide and method for making which is nonmagnetic as well as superior mechanical properties such as wear-resistance and toughness, and further does not require a water toughing heat treatment which has been needed when nonmagnetic high manganese steel (high manganese cast steel) is obtained by crystallized spheroidal vanadium in austenite matrix, and the high manganese cast iron containing spheroidal vanadium carbide is comprised of C 1.5˜4.0 weight %, V 6˜15 weight %, Si 0.2˜4.0 weight %, Mn 10˜18 weight %, Mg 0.01˜0.1 weight %, remaining iron (Fe) and inevitable impurities, spheroidal vanadium carbide is crystallized within a structure.
    Type: Grant
    Filed: June 13, 2003
    Date of Patent: June 21, 2005
    Assignees: Osaka Prefecture, Kabushiki Kaisha Sankyogokin Chuzoasho, Okamoto Co., Ltd.
    Inventors: Tadashi Kitudo, Mamoru Takemura, Mituaki Matumuro, Hideto Matumoto, Takao Horie, Kazumichi Shimizu
  • High manganese cast iron containing spheroidal vanadium carbide and method for making thereof
    Publication number: 20040151612
    Abstract: The purpose of the present invention is to provide high manganese cast iron containing spheroidal vanadium carbide and method for making thereof which is nonmagnetic as well as superior mechanical properties such as wear-resistance and toughness, and further does not require a water toughing heat treatment which has been needed when nonmagnetic high manganese steel (high manganese cast steel) is obtained by crystallized spheroidal vanadium in austenite matrix, and the high manganese cast iron containing spheroidal vanadium carbide is comprised of C 1.5˜4.0 weight %, V 6˜15 weight %, Si 0.2˜4.0 weight %, Mn 10˜18 weight %, Mg 0.01˜0.1 weight %, remaining iron (Fe) and inevitable impurities, spheroidal vanadium carbide is crystallized within a structure.
    Type: Application
    Filed: June 13, 2003
    Publication date: August 5, 2004
    Applicants: Osaka Prefecture, Kabushiki Kaisha Sankyogokin Chuzosho, OKAMOTO CO. LTD
    Inventors: Tadashi Kitudo, Mamoru Takemura, Mituaki Matumuro, Hideto Matumoto, Takao Horie, Kazumichi Shimizu