Patents by Inventor Tadaaki Morishita

Tadaaki Morishita 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).

  • Galvannealed steel sheets exhibiting excellent press die sliding property
    Patent number: 5324594
    Abstract: In a hot-dip zinc-coated steel sheet exhibiting excellent press die sliding characteristics and obtained by performing a molten galvanization and then skin pass rolling on a surface of the steel sheet, a galvanized layer has a three-dimensional average surface roughness ranging from 0.7 .mu.m to 1.4 .mu.m, and a skewness (S) of the amplitude probability distribution of the surface roughness, which is defined by the following equation (1), ranging from 0.1 to -0.3:S=.mu..sub.3 /.sigma..sup.3 (1)where.mu..sub.3 : Three-dimensional moment of the amplitude probability density.sigma.: Standard deviation of the amplitude probability density.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: June 28, 1994
    Assignees: Kawasaki Steel Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Yasuda, Takaaki Hira, Toshitake Hanazawa, Hiroaki Ueno, Yoshihisa Serizawa, Tadaaki Morishita, Kazuyoshi Sato