Patents by Inventor Hans J. Holland

Hans J. Holland 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).

  • Glass-ceramic containing a stabilized hexacelsian crystal structure
    Patent number: 5910459
    Abstract: The glass-ceramic material of the present invention has the hexagonal sheet structure of hexacelsian as its primary crystal phase and exhibits x-ray diffraction patterns indicative of hexacelsian, said glass-ceramic material has a stabilized thermal expansion and an overall weight percent composition comprising: 35-55% SiO.sub.2, 5-25% Al.sub.2 O.sub.3, 5-25% MgO, 5-35% BaO, 6-14% TiO.sub.2, 0-10% ZnO, and 0-8% ZrO.sub.2.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: June 8, 1999
    Assignee: Corning Incorporated
    Inventors: George H. Beall, Hans J. Holland, Jeffrey T. Kohli
  • Inhibiting crystallization of opal glass compositions
    Patent number: 4323653
    Abstract: The instant invention is directed to the production of spontaneous opal glass compositions which limit the generation of CaF.sub.2 and crystals having a xonotlite structure therein when heat treated at temperatures higher than the annealing point, but lower than the softening point of the glass. The glasses consist essentially, as analyzed in weight percent on the oxide basis, of about:______________________________________ SiO.sub.2 64.5 .+-. 2.0 Al.sub.2 O.sub.3 6.25 .+-. 0.5 Na.sub.2 O 3.0 .+-. 0.5 K.sub.2 O 3.0 .+-. 0.5 MgO 1.25 .+-. 0.3 B.sub.2 O.sub.3 4.5 .+-. 0.7 F 3.25 .+-. 0.5 CaO 14.5 .+-. 1.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: April 6, 1982
    Assignee: Corning Glass Works
    Inventors: Hans J. Holland, John E. Megles, Jr.