Patents by Inventor Volmar Geiler

Volmar Geiler 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).

  • Optical glass having n.sub.D =1.63.+-.(1.5.times.10.sup.-2), v.sub.D =59.5.+-.1.0 with a high chemical stability and a low tendency to crystallization
    Patent number: 4343908
    Abstract: An optical glass having n.sub.D =1.63.+-.(1.5.times.10.sup.-2), v.sub.D =59.5.+-.1.0, a high chemical stability and a low tendency to crystallization is provided, consisting essentially of (in percent. by weight):______________________________________ SiO.sub.2 23-27 B.sub.2 O.sub.3 24-30 SrO 18-31 La.sub.2 O.sub.3 10-16 Al.sub.2 O.sub.3 2-4 BaO 0-10 CaO 0-5 ZnO 0-6 Y.sub.2 O.sub.3 0-5 ZrO.sub.2 0-2 Li.sub.2 O, Na.sub.2 O and/or K.sub.2 O 0-1.5 As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3 0-1 F and/or Cl 0-1, ______________________________________wherein the sum of SiO.sub.2 +B.sub.2 O.sub.3 is 50-53, the weight ratio SiO.sub.2 :B.sub.2 O.sub.3 is 0.8-1.0, the sum SrO+BaO is 26-31, and the sum ZnO+La.sub.2 O.sub.3 is 12-17.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: August 10, 1982
    Assignee: Schott Glaswerke
    Inventors: Marga Faulstich, Volmar Geiler