Patents by Inventor Hironori Fujita

Hironori Fujita 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).

  • Treating composition, forming a mixed-carbide layer of Va-Group elements and of chromium on a ferrous-alloy surface and resulting product
    Patent number: 4230751
    Abstract: A method and treating material are presented for forming a mixed-carbide layer of at least one Va-Group element and of chromium on the surface of a carbon-containing ferrous-alloy material. A molten treating bath is prepared by introducing one or more Va-Group elements in oxide form and chromium in metal or alloy form or by introducing one or more Va-Group elements in metal or alloy form and at least one chromium oxide into a molten bath composed of boric acid, of at least one borate or of a mixture thereof. An article of carbon-containing ferrous alloy is immersed and maintained in the molten treating bath until a mixed-carbide layer is formed on its surface. The mixed-carbide layer formed on the surface of the article is very smooth, wear resistant and high-temperature-oxidation resistant.
    Type: Grant
    Filed: August 8, 1978
    Date of Patent: October 28, 1980
    Assignees: Kabushiki Kaisha Toyota, Chuo Kenkyusho
    Inventors: Noboru Komatsu, Tohru Arai, Hironori Fujita