Patents by Inventor Gertraud A. A. Meden-Piesslinger

Gertraud A. A. Meden-Piesslinger 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).

  • Precision pressed optical components made of glass and glass suitable therefor
    Patent number: 4391915
    Abstract: Optical components can be pressed with such a precision that grinding and polishing of the formed components is not necessary, from glasses containing 45-55 wt. % P.sub.2 O.sub.5, 3.5-9 wt. % Al.sub.2 O.sub.3, 5-20 wt. % K.sub.2 O, 0-3 wt. % Li.sub.2 O, 8-15% BaO, 4.5-9 wt. % ZnO, 0-6 wt. % MgO, 0-18 wt. % PbO, 0-1 wt. % SiO.sub.2, 0-3 wt. % B.sub.2 O.sub.3, 0-2 wt. % TiO.sub.2.
    Type: Grant
    Filed: December 7, 1981
    Date of Patent: July 5, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Gertraud A. A. Meden-Piesslinger, Johannes H. P. Van de Heuvel