Patents by Inventor Tomonao Tateyama

Tomonao Tateyama 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).

  • Precipitation hardening stainless steels
    Patent number: 5630983
    Abstract: A precipitation hardening stainless steel, which is excellent in cold workability at a solution treated state and good in proof stress after overaging treatment, consists essentially of C.ltoreq.0.010, Ni 0.010.about.0.025% (provided C+N.ltoreq.0.025%), Si.ltoreq.1.0%, Mn.ltoreq.1.2%, P.ltoreq.0.040%, S.ltoreq.0.030%, Cu: 3.0.about.5.0%, Ni: 3.0.about.4.65%, Cr: 13.0.about.16.5%, Mo.ltoreq.1.0%, Nb: (-11.43 (C+N)+0.6).about.0.5% and the balance Fe on condition that452 (C+N)+11.1 (Ni+Mn).ltoreq.73.1.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: May 20, 1997
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Tomonao Tateyama, Tetsuya Shimizu, Michio Okabe