Patents by Inventor Douglas W. Wilkinson

Douglas W. Wilkinson 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).

  • Removal of ceramic shell mold material from castings
    Patent number: 5913354
    Abstract: Method for removing ceramic shell mold material from one or more castings in a relatively rapid manner wherein the casting and hot caustic solution spray nozzles are relatively moved to direct hot caustic solution under pressure at the castings to remove post-knock-out ceramic shell material thereon prior to further processing of the castings.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: June 22, 1999
    Assignee: Howmet Research Corporation
    Inventors: Patrick L. Conroy, Douglas W. Wilkinson
  • Removal of ceramic shell mold material from castings
    Patent number: 5678583
    Abstract: Method and apparatus for removing ceramic shell mold material from one or more castings in a relatively rapid manner wherein the casting and hot caustic solution spray nozzles are relatively moved to direct hot caustic solution under pressure at the castings to remove post-knock-out ceramic shell material thereon prior to further processing of the castings.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: October 21, 1997
    Assignee: Howmet Research Corporation
    Inventors: Patrick L. Conroy, Douglas W. Wilkinson