Patents by Inventor Alex Curdt

Alex Curdt 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
    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