Patents by Inventor Wilhelm Pirmin

Wilhelm Pirmin 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).

  • Microcrystalline ?-AlOshaped body, method for the production and use thereof
    Patent number: 7169198
    Abstract: The invention relates to a method for the production of a sintered, microcrystalline ?-Al2O3-based shaped body, which are used, for example, as abrasive bodies, wherein an ?-Al2O3 powder is used as starting material, said powder having an average particle diameter of <2 ?m, and processed with at least one binder and a solvent with the purpose of obtaining an extrudable material that is subsequently extruded. The extrudate is then further processed into a shaped body that is sintered at a temperature range of between 1300° C. and 1750° C.
    Type: Grant
    Filed: February 8, 2001
    Date of Patent: January 30, 2007
    Assignee: Treibacher Schleifmittel GmbH
    Inventors: Paul Moeltgen, Wilhelm Pirmin, Frank J. Clemens