Patents by Inventor Ulrich Hielscher

Ulrich Hielscher 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).

  • Diecasting alloy
    Patent number: 6364970
    Abstract: The diecasting alloy based on aluminium-silicon contains 9.5 to 11.5 w. % silicon 0.1 to 0.5 w. % magnesium 0.5 to 0.8 w. % manganese max 0.15 w. % iron max 0.03 w. % copper max 0.10 w. % zinc max 0.15 w. % titanium with the remainder aluminium and for permanent refinement 30 to 300 ppm strontium.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: April 2, 2002
    Assignee: Aluminium Rheinfelden GmbH
    Inventors: Ulrich Hielscher, Horst Sternau, Hubert Koch
  • Process for grain refinement of aluminium casting alloys, in particular aluminium/silicon casting alloys
    Patent number: 5250125
    Abstract: For the grain refinement of aluminum casting alloys, in particular aluminum/silicon casting alloys, gallium phosphide and/or indium phosphide are/is added to the melt, optionally in addition to further grain-refinement and/or modification additions. The addition of gallium phosphide and/or indium phosphide results in a good grain refinement with low shrink-hole tendency and does not have an adverse effect on modification processes.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: October 5, 1993
    Assignee: Alusuisse-Lonza Services Ltd.
    Inventors: Hubert Koch, Jean-Claude Jaquet, Ulrich Hielscher