Patents by Inventor Johann Spincic

Johann Spincic 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).

  • Titanium dioxide containing glasses having a high index of refraction and a high dispersion and process of producing same
    Patent number: 3960579
    Abstract: Optical silicate glasses containing titanium dioxide and having a high index of refraction and high dispersion are composed of1 % to 10 %, by weight, of silicon dioxide SiO.sub.2,30 % to 50 %, by weight, of barium oxide BaO,18 % to 24 %, by weight, aluminum oxide Al.sub.2 O.sub.3, and21 % to 30 %, by weight, of titanium dioxide TiO.sub.2.In such glasses the barium oxide can be replaced partially by sodium oxide Na.sub.2 O, beryllium oxide BeO, calcium oxide CaO, strontium oxide SrO, cadmium oxide CdO, gadolinium oxide Ga.sub.2 O.sub.3, indium oxide In.sub.2 O.sub.3, or yttrium oxide Y.sub.2 O.sub.3. Likewise, the silicon dioxide therein can be replaced partially by boron trioxide B.sub.2 O.sub.3, lead monoxide PbO, germanium dioxide GeO.sub.2, stannic oxide SnO.sub.2, zirconium oxide ZrO.sub.2, hafnium oxide HfO.sub.2, or thorium oxide ThO.sub.2.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: June 1, 1976
    Assignee: Ernst Leitz GmbH, Optische Werke
    Inventors: Heinz Broemer, Norbert Meinert, Johann Spincic