Patents by Inventor David Langohr

David Langohr 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).

  • Molten grains of alumina-zirconia
    Patent number: 9212097
    Abstract: The invention relates to a fused grit having the following chemical analysis, in wt %: ZrO2+HfO2: 38.0-46.0%; Al2O3: the remainder up to 100%; SiO2: 0.20-0.60%; Y2O3: 0.45 to 0.70%; TiO2: 1.00 to 2.00%; other oxides: <1.00%, the ratio of Y2O3/SiO2 being 0.80 to 2.00, and the tetragonal phase being 60 to 90% of the weight of the zirconia, the remainder being in monoclinic form.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: December 15, 2015
    Assignee: SAINT-GOBAIN CENTRE DE RECHERCHES ET D' ETUDES EUROPEEN
    Inventors: Samuel Marlin, David Langohr, Sylvain Petigny
  • Fused alumina/zirconia grain mixture
    Patent number: 8551203
    Abstract: A molten alumina/zirconia grain mixture having the following chemical composition, in wt %: ZrO2+HfO2: 35 to 45.5%; Al2O3: 43.7 to 65%; other oxides: <10%; SiO2: <0.8%, which simultaneously adheres to a granulometric condition and to a densimetric condition.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: October 8, 2013
    Assignee: Saint-Gobain Centre de Recherches et d'Etudes European
    Inventors: Samuel Marlin, David Langohr, Anthony Gaeta
  • FUSED ALUMINA/ZIRCONIA GRAIN MIXTURE
    Publication number: 20120028544
    Abstract: A molten alumina/zirconia grain mixture having the following chemical composition, in wt %: ZrO2+HfO2: 35 to 45.5%; Al2O3: 43.7 to 65%; other oxides: <10%; SiO2: <0.8%, which simultaneously adheres to a granulometric condition and to a densimetric condition.
    Type: Application
    Filed: March 11, 2010
    Publication date: February 2, 2012
    Applicant: Saint-Gobain Centre De Recherches Et D'Etudes Europeen
    Inventors: Samuel Marlin, David Langohr, Anthony Gaeta