Patents by Inventor Georg Gottschamel

Georg Gottschamel 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).

  • Sintered microcrystalline ceramic material
    Patent number: 5302564
    Abstract: Abrasive material with particularly high abrasive performance is obtained in that the ceramic material contains an additive of 0.01 to 15 percent by weight, preferably 0.1 to 3 percent by weight of a chromium compound.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: April 12, 1994
    Assignee: Treibacher Chemische Werke Aktiengesellschaft
    Inventors: Herwig Winkler, Peter Janz, Georg Gottschamel
  • Ceramic sintered body and method of producing it
    Patent number: 5141527
    Abstract: Ceramic sintered body, in particular abrasive grain, based on .alpha.-Al.sub.2 O.sub.3, said body being arranged in such a manner that improved abrasive results are achieved, said body being bound into a structure by means of a glass-like ceramic binder and showing a drop in hardness from its center to its edge of less than 1800 N/mm.sup.2, preferably less than 1000 N/mm.sup.2, and, in particular, less than 500 N/mm.sup.2.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: August 25, 1992
    Assignee: Treibacher Chemische Werke Aktiengesellschaft
    Inventors: Herwig Winkler, Peter Janz, Georg Gottschamel
  • Sintered microcrystalline ceramic material
    Patent number: 5106791
    Abstract: Sintered microcrystalline ceramic material based on .alpha.-Al.sub.2 O.sub.3 with an addition of 0.01 to 2.0 weight percent of a cerium compound, consisting of a microcrystalline matrix and 0.1 to 30 volume percent whisker-like needles, whereby said cerium compound is mainly present in the needles. The whisker-like needles give this material a special tenacity combined with good abrasive results.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: April 21, 1992
    Assignee: Treibacher Chemische Werke Aktiengesellschaft
    Inventors: Herwig Winkler, Peter Janz, Georg Gottschamel
  • Sintered microcrystalline ceramic material
    Patent number: 5053369
    Abstract: Sintered microcrystalline ceramic material based on .alpha.-Al.sub.2 O.sub.3 with an addition of 0.01 to 2.0 weight percent of a cerium compound, consisting of a microcrystalline matrix and 0.1 to 30 volume percent whisker-like needles, whereby said cerium compound is mainly present in the needles. The whisker-like needles give this material a special tenacity combined with good abrasive results.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: October 1, 1991
    Assignee: Treibacher Chemische Werke Aktiengesellschaft
    Inventors: Herwig Winkler, Peter Janz, Georg Gottschamel
  • .alpha.-Al.sub.2 O.sub.3 abrasive material and method of preparing the same
    Patent number: 4799938
    Abstract: A sintered, microcrystalline abrasive material consists of at least 99.5%, by weight, of .alpha.-Al.sub.2 O.sub.3 crystallites having a size of less than 2 .mu. and the material having a density of at least 97% of the theoretical density. This abrasive material has a very high abrasive property and can be used in grinding bands or discs.
    Type: Grant
    Filed: September 22, 1987
    Date of Patent: January 24, 1989
    Assignee: Treibacher Chemische Werke AG
    Inventors: Peter Janz, Georg Gottschamel
  • Microcrystalline abrasive material and method of manufacture
    Patent number: 4786292
    Abstract: An abrasive material of great hardness and high tenacity particularly suitable for high-pressure grinding consists essentially of a sintered, microcystalline .alpha.--Al.sub.2 O.sub.3 abrasive material having a purity of least 98.5% and a density of at least 95% of theoretical density, the .alpha.--Al.sub.2 O.sub.3 crystallites of the material being smaller than 4.mu., preferably smaller than 3.mu..
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: November 22, 1988
    Assignee: Treibacher Chemische Werke Aktiengesellschaft
    Inventors: Peter Janz, Herwig Winkler, Georg Gottschamel