Patents by Inventor Norbert Dreer

Norbert Dreer 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 and tool of tungsten/heavy metal alloy for hot-forging solid state copper and copper alloys
    Patent number: 6796162
    Abstract: The tungsten/heavy metal alloy is suitable for tools such as extrusion dies and extrusion mandrels for the hot-forming of copper and copper alloys. The novel alloy consists of 80 to 89.9% by weight of tungsten, 2 to 7% by weight of chromium, and a remainder of binder metal. The use of the novel alloy primarily results in a considerably reduced formation of grooves on the surface of the forming tools.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: September 28, 2004
    Assignee: Plansee Aktiengesellschaft
    Inventors: Norbert Dreer, Robert Grill, Joachim Resch
  • Method and tool of tungsten/heavy metal alloy for hot-forging copper and copper alloys
    Publication number: 20020112523
    Abstract: The tungsten/heavy metal alloy is suitable for tools such as extrusion dies and extrusion mandrels for the hot-forming of copper and copper alloys. The novel alloy consists of 80 to 89.9% by weight of tungsten, 2 to 7% by weight of chromium, and a remainder of binder metal. The use of the novel alloy primarily results in a considerably reduced formation of grooves on the surface of the forming tools.
    Type: Application
    Filed: December 19, 2001
    Publication date: August 22, 2002
    Inventors: Norbert Dreer, Robert Grill, Joachim Resch
  • Filtering cartridge
    Patent number: 5868810
    Abstract: A filtering cartridge made of compacted and sintered particles is manufactured from a powder consisting of chromium or a chromium alloy with at least 70% Cr by weight and a particle size of the chromium particles between 160 .mu.m and 500 .mu.m. Filtering cartridges of this type can be used advantageously, particularly in gas clarification for energy production by biomass gasification or coal gasification, in cracking processes in the petroleum industry, as well as for the production of melamine resin.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: February 9, 1999
    Assignee: Schwarzkopf Technologies Corporation
    Inventors: Norbert Dreer, Robert Grill, Silvia Kremshofer