Patents by Inventor Tadao Onaka

Tadao Onaka 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 preventing agglomeration of powder
    Patent number: 5204024
    Abstract: A method for preventing agglomeration of powder, characterized in that a polyvinyl pyrrolidone and/or a vinyl pyrrolidone-vinyl ester copolymer is incorporated as an anti-agglomeration agent to the powder.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: April 20, 1993
    Assignee: Tosoh Corporation
    Inventors: Tadao Onaka, Hiroshi Fukuda
  • Method for preventing agglomeration of powder
    Patent number: 5122300
    Abstract: A method for preventing agglomeration of powder, characterized in that a poly(oxyethylene)diglycosic acid is incorporated as an anti-agglomeration agent to the powder.
    Type: Grant
    Filed: October 9, 1991
    Date of Patent: June 16, 1992
    Assignee: Tosoh Corporation
    Inventors: Tadao Onaka, Akihiko Nomura, Hiroshi Fukuda, Shoji Arai