Patents by Inventor Roger W. Haskell

Roger W. Haskell 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 of making a gas turbine blade having a duplex coating
    Patent number: 5260099
    Abstract: A stainless steel gas turbine engine compressor blade is protected against corrosion by providing a thin sacrificial coating in the form of a coherent aluminum body in electrically-conducting contact with the blade surface, then overcoating the aluminum coat with a phosphate-chromate mixture in organic vehicle and drying and heating to cure and repeating the overcoating step several times to harden and densify the resulting ceramic body.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: November 9, 1993
    Assignee: General Electric company
    Inventor: Roger W. Haskell
  • Steel articles having protective duplex coatings and method of production
    Patent number: 5098797
    Abstract: A sacrificial metallic undercoat is provided between the surface of the gas turbine engine stainless steel compressor blade and a protective overcoat of ceramic material.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: March 24, 1992
    Assignee: General Electric Company
    Inventor: Roger W. Haskell