Patents by Inventor Thomas A. Legard

Thomas A. Legard 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).

  • Platinum modified aluminide diffusion coating and method
    Patent number: 6136451
    Abstract: A method of improving oxidation resistance of a platinum modified aluminide diffusion coating on a substrate involves electroplating the substrate with a platinum layer from an aqueous hydroxide based electroplating solution and aluminizing the substrate to grow the platinum modified aluminide diffusion coating on said layer. The electroplating solution preferably includes an alkali element and/or alkaline earth element that is incorporated in the platinum layer and in the aluminide diffusion coating formed thereon to significantly improve oxidation resistance of the coating.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: October 24, 2000
    Assignee: Howmet Research Corporation
    Inventors: Bruce M. Warnes, Thomas A. Legard, Nick S. DuShane, Jack E. Cockerill, Robert W. Beck
  • Platinum modified aluminide diffusion coating and method
    Patent number: 5788823
    Abstract: A method of improving oxidation resistance of a platinum modified aluminide diffusion coating on a substrate involves electroplating the substrate with a platinum layer from an aqueous hydroxide based electroplating solution and aluminizing the substrate to grow the platinum modified aluminide diffusion coating on said layer. The electroplating solution preferably includes an alkali element and/or alkaline earth element that is incorporated in the platinum layer and in the aluminide diffusion coating formed thereon to significantly improve oxidation resistance of the coating.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: August 4, 1998
    Assignee: Howmet Research Corporation
    Inventors: Bruce M. Warnes, Thomas A. Legard, Nick S. DuShane, Jack E. Cockerill, Robert W. Beck