Patents by Inventor Pirmin Wilhelm

Pirmin Wilhelm 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 alpha-a12O3 shaped body, method for the production and use thereof
    Publication number: 20030029094
    Abstract: The invention relates to a method for the production of a sintered, microcrystalline &agr;-Al2O3-based shaped body, which are used, for example, as abrasive bodies, wherein an &agr;-Al2O3 powder is used as starting material, said powder having an average particle diameter of <2 &mgr;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: Application
    Filed: September 13, 2002
    Publication date: February 13, 2003
    Inventors: Paul Moeltgen, Pirmin Wilhelm
  • MOULDED SPHERICAL CERAMIC BODY, PRODUCTION PROCESS AND USE
    Publication number: 20010029229
    Abstract: The present invention concerns a moulded microcrystalline spherical Al2O3- sintered body, process for its production as well as its use.
    Type: Application
    Filed: November 23, 1998
    Publication date: October 11, 2001
    Inventors: PAUL MOELTGEN, PIRMIN WILHELM, MARTIN LUETTE
  • Moulded spherical ceramic body, production process and use
    Patent number: 6284694
    Abstract: The present invention concerns a moulded microcrystalline spherical Al2O3- sintered body, process for its production as well as use.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: September 4, 2001
    Assignee: Korund Laufenburg GmbH
    Inventors: Paul Moeltgen, Pirmin Wilhelm, Martin Luette
  • Process for producing sintered .alpha.-Al.sub.2 O.sub.3 bodies and their use
    Patent number: 5665127
    Abstract: Microcrystalline bodies based on .alpha.-Al.sub.2 O.sub.3 are made by drying sub-micron powders, press compacting and shock sintering at an intermediate sinter temperature range of 1,300.degree. to 1,550.degree. C., i.e. bringing the compact up to such range in under 60 seconds, preferably under 10.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: September 9, 1997
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Paul Moltgen, Pirmin Wilhelm, Josef Schmoll