Patents by Inventor Werener Schumann

Werener Schumann 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).

  • Lightwave guide produced from special substrate glasses by ion exchange against CS.sup.+ ions
    Patent number: 5004707
    Abstract: Production of mono- or multimodal lightwave guides from special substrate glasses of the glass system SiO.sub.2 --B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 -- K.sub.2 O--F.sup.-, with partial exchange of the Li.sup.+, Na.sup.+, and/or K.sup.+ ions present in the glass against Cs.sup.+ ions, the substrate glasses having the following compositions (in mol.-%): SiO.sub.2 45-72, B.sub.2 O.sub.3 8-25, Al.sub.2 O.sub.3 1-25, Li.sub.2 O 0-1, Na.sub.2 O 0-2, K.sub.2 O 6-18, MO 0-1 (MO=MgO, CaO, SrO, BaO, ZnO, PbO), in which a portion of the O.sup.- ions present in the glass are replaced by 1-15 mol % F.sup.- ions.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: April 2, 1991
    Assignee: Schott Glaswerke
    Inventors: Ludwig Ross, Werener Schumann