Patents by Inventor Manabu Kumagaya

Manabu Kumagaya 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 phosphatizing iron and steel
    Patent number: 6361623
    Abstract: A high quality lubricant carrier for lubrication in cold plastic working of iron and steel is provided by a process in which the surfaces of objects to be worked are first treated with a surface conditioning liquid composition that contains dispersed fine particles of at least one of a Jernstedt salt, zinc phosphate, zinc calcium phosphate, and calcium phosphate, and is then treated by a phosphatizing solution that contains calcium cations.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: March 26, 2002
    Assignee: Henkel Corporation
    Inventors: Kazuhiro Ishikura, Manabu Kumagaya, Takaomi Nakayama