Patents by Inventor Masanobu Yamaguti

Masanobu Yamaguti 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).

  • Method for heat treatment of high-toughness weld metals
    Patent number: 4062705
    Abstract: A method for obtaining a weld metal having excellent toughness at low temperatures as below -40.degree. C, which method comprises heating the weld metal having a specific steel composition to its austenitizing temperature and cooling it or holding it at the temperature for not longer than 25 minutes and then quenching and tempering it. In order to further improve the low temperature toughness, the weld metal is reheated again to the Ac.sub.1 to Ac.sub.3 range. Excellent low temperature toughness of the weld metal can be obtained without the necessity of using any special welding materials.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: December 13, 1977
    Assignee: Nippon Steel Corporation
    Inventors: Hisashi Gondo, Hajime Nakasugi, Turugi Kimura, Masanobu Yamaguti
  • Method for producing a high tensile strength and high toughness bend pipe
    Patent number: 3973999
    Abstract: A method for producing a high tensile strength and toughness bend pipe in which a heat treatment is done as a pretreatment prior to bending, and a tempering treatment is done, if necessary, after the bending, and the bend pipe produced by the present invention is useful for pipe line construction and shows excellent properties at low temperatures.
    Type: Grant
    Filed: July 11, 1975
    Date of Patent: August 10, 1976
    Assignee: Nippon Steel Corporation
    Inventors: Masatoki Nakayama, Hajime Nakasugi, Hiroshi Tamehiro, Turugi Kimura, Masanobu Yamaguti