Patents by Inventor Doris Ehrt

Doris Ehrt 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).

  • Core glass in the alkali-zinc-silicate glass system for an fiber-optic light guide and fiber-optic light guide made with said core glass
    Patent number: 8039410
    Abstract: A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO2; 18.5-30, ZnO; 8-20, ? alkali metal oxides; 0.5-3, La2O3; 2-5, ZrO2; 0.02-5, HfO2; 2.02-5, ? ZrO2+HfO2; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, ? alkaline earth metal oxides; 0.5-3, Li2O, but no more Li2O than 25% of the ? alkali metal oxides; >58.5, ? SiO2+ZrO2+HfO2. A molar ratio of Na2O/K2O is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: October 18, 2011
    Assignee: Schott AG
    Inventors: Uwe Kolberg, Axel Curdt, Monika Gierke, Magdalena Winkler-Trudewig, Guenther Kron, Doris Ehrt
  • CORE GLASS IN THE ALKALI-ZINC-SILICATE GLASS SYSTEM FOR AN FIBER-OPTIC LIGHT GUIDE AND FIBER-OPTIC LIGHT GUIDE MADE WITH SAID CORE GLASS
    Publication number: 20090163342
    Abstract: A core glass and a fiber-optic light guide made from it are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO2; 18.5-30, ZnO; 8-20, ? alkali oxides; 0.5-3, La2O3; 2-5, ZrO2; 0.02-5, HfO2; 2.02-5, ?ZrO2+HfO2; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, ? alkaline earth oxides; 0.5-3, Li2O, but no more Li2O than 25% of the ? alkali oxides; >58.5, ? SiO2+ZrO2+HfO2. A molar ratio of Na2O/K2O is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Inventors: Uwe Kolberg, Alex Curdt, Monika Gierke, Magdalena Winkler-Trudewig, Guenther Kron, Doris Ehrt
  • Standard for referencing luminescence signals
    Patent number: 7521670
    Abstract: The invention discloses a standard for referencing luminescence signals, having an optically transparent base material comprising a lanthanum phosphate glass, a fluorophosphate glass, a fluor-crown glass, a lanthanum glass, a glass-ceramic formed therefrom or a lithium aluminosilicate glass-ceramic, the base material including a bulk doping with at least one constituent which is luminescent and comprises at least one rare earth and/or a nonferrous metal, in particular cobalt, chromium or manganese.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: April 21, 2009
    Assignees: Schott AG, BAM Bundesanstalt fuer Materialforschung und -pruefung
    Inventors: Axel Engel, Rainer Haspel, Ute Resch-Genger, Katrin Hoffmann, Doris Ehrt, Uwe Kolberg, Joseph S. Hayden, Michael Stelzl
  • Standard for referencing luminescence signals
    Publication number: 20060202118
    Abstract: The invention discloses a standard for referencing luminescence signals, having an optically transparent base material comprising a lanthanum phosphate glass, a fluorophosphate glass, a fluor-crown glass, a lanthanum glass, a glass-ceramic formed therefrom or a lithium aluminosilicate glass-ceramic, the base material including a bulk doping with at least one constituent which is luminescent and comprises at least one rare earth and/or a nonferrous metal, in particular cobalt, chromium or manganese.
    Type: Application
    Filed: August 23, 2005
    Publication date: September 14, 2006
    Inventors: Axel Engel, Rainer Haspel, Ute Resch-Genger, Katrin Hoffmann, Doris Ehrt, Uwe Kolberg, Joseph Hayden, Michael Stelzl
  • Standard for referencing luminescence signals
    Publication number: 20060199018
    Abstract: The invention discloses a standard for referencing luminescence signals, having an optically transparent base material comprising a lanthanum phosphate glass, a fluorophosphate glass, a fluor-crown glass, a lanthanum glass, a glass-ceramic formed therefrom or a lithium aluminosilicate glass-ceramic, the base material including a bulk doping with at least one constituent which is luminescent and comprises at least one rare earth and/or a nonferrous metal, in particular cobalt, chromium or manganese.
    Type: Application
    Filed: February 24, 2006
    Publication date: September 7, 2006
    Inventors: Axel Engel, Rainer Haspel, Ute Resch-Genger, Katrin Hoffmann, Doris Ehrt, Uwe Kolberg, Joseph Hayden, Michael Stelzl