Patents by Inventor Andre Sikkema

Andre Sikkema 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).

  • Steel tool provided with a boron layer
    Patent number: 5217817
    Abstract: A steel substrate is provided with an aluminum intermediate layer and a boron layer. The aluminum intermediate layer provides a substantially improved adhesion of the boron layer. The boron layer is provided by a low-temperature CVD process.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: June 8, 1993
    Assignee: U.S. Philips Corporation
    Inventors: Gerrit Verspui, Jacobus M. M. Verheijen, Andre Sikkema
  • Method of applying a boron layer to a steel substrate by a CVD process
    Patent number: 5164230
    Abstract: A steel substrate is provided first with an aluminum intermediate layer and then, by a CVD process, with an outer layer of boron.
    Type: Grant
    Filed: November 7, 1990
    Date of Patent: November 17, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Gerrit Verspui, Jacobus M. M. Verheijen, Andre Sikkema