Patents by Inventor Shizuhiro Teshima

Shizuhiro Teshima 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).

  • Oxidation-resisting austenitic stainless steel
    Patent number: 4108641
    Abstract: An austenitic stainless steel substantially comprising not more than 0.15% by weight of C, 2.56 - 4.0% by weight of Si, not more than 2.0% by weight of Mn, 8 - 22% by weight of Ni, 16 - 25% by weight of Cr, 0.001 - 0.05% by weight of at least one alkaline earth metal, 0 - 2.5% by weight of Al, 0 - 0.1% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Nb, Ta, Ti, Zr and Hf, 0 - 2.0% by weight of Cu and balance Fe is disclosed. This class of steels are superior to the known high Si oxidation-resisting austenitic stainless steels in oxidation resistance especially in resistance to scaling, are of the same level in high temperature strength, and are much less expensive.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: August 22, 1978
    Assignee: Nisshin Steel Company, Limited
    Inventors: Tokio Fujioka, Masayuki Kinugasa, Shozo Iizumi, Shizuhiro Teshima, Isamu Shimizu
  • Oxidation-resisting austenitic stainless steel
    Patent number: 4063935
    Abstract: An austenitic stainless steel substantially comprising not more than 0.15% by weight of C, 2.56 - 4.0% by weight of Si, not more than 2.0% by weight of Mn, 8 - 22% by weight of Ni, 16 - 25% by weight of Cr, 0.001 - 0.05% by weight of at least one alkaline earth metal, 0 - 2.5% by weight of Al, 0 - 0.1% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Nb, Ta, Ti, Zr and Hf, 0 - 2.0% by weight of Cu and balance Fe is disclosed. This class of steels are superior to the known high Si oxidation-resisting austenitic stainless steels in oxidation resistance especially in resistance to scaling, are of the same level in high temperature strength, and are much less expensive.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: December 20, 1977
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Tokio Fujioka, Masayuki Kinugasa, Shozo Iizumi, Shizuhiro Teshima, Isamu Shimizu
  • Heat-resisting austenitic stainless steel
    Patent number: 3989514
    Abstract: An austenitic stainless steel comprising not more than 0.15% by weight of C, 1.5 - 4.0% by weight of Si, not more than 2% by weight of Mn, 17.0 - 30.0% by weight of Ni, 24.0 - 32.0% by weight of Cr, 0.5 - 2.5% by weight of Al, 0.001 - 0.100% by weight of Ca, 0.001 - 0.100% by weight of at least one rare earth metal, 0 - 1.0% by weight of at least one of Ti, Zr, Hf, Nb and Ta, and balance Fe and incidental impurities is disclosed. Steels of this class are superior to the known high Si oxidation-resisting austenitic stainless steels in scaling and nitriding resistance and with stand prolonged use under the circumstances where the steels undergo cyclic heating to high temperatures.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: November 2, 1976
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Tokio Fujioka, Masayuki Kinugasa, Shozo Iizumi, Shizuhiro Teshima, Isamu Shimizu