Patents by Inventor Yutaka Okabayashi

Yutaka Okabayashi 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 forming wear-resistant layer and iron-based material, on which wear-resistant layer is applied
    Patent number: 6139973
    Abstract: A thin sulfurizing layer having high iron-sulfide content is formed by an electrolytic deposition method using an alkaline electrolytic solution which contains ferric ions, sulfide and a chelating agent of the ferric ions.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: October 31, 2000
    Assignee: Nihon Parkerizing Co., LTD
    Inventors: Iwao Kawasaki, Yutaka Okabayashi, Masatake Higashi
  • Process for forming a phosphate conversion coating
    Patent number: 5904785
    Abstract: To prevent the deterioration in water-resistant secondary adherence that occurs during prolonged use of a fluoride-containing phosphate conversion coating liquid composition to form a conversion coating on metal surfaces that are at least partly aluminiferous, the aluminum compound-containing sludge produced in the phosphate conversion coating liquid composition as it is used is coagulated and sedimented by adding at least one cationic polymeric coagulant to the sludge-containing phosphate conversion coating liquid composition.
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: May 18, 1999
    Assignee: Henkel Corporation
    Inventors: Kenji Aizawa, Yutaka Okabayashi