Patents by Inventor Wolfgang Porcham

Wolfgang Porcham 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).

  • Gem comprised of a glass based on silicon oxide and calcium oxide
    Patent number: 5559061
    Abstract: A glass composition substantially comprising silicon oxide, calcium oxide and aluminum oxide, and its use for producing gems.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: September 24, 1996
    Assignee: D. Swarovski & Co.
    Inventors: Norbert Bilek, Wolfgang Porcham, Michael Schlamadinger, Gerold Sprachmann
  • Process for producing silane
    Patent number: 4623531
    Abstract: A process for producing silane, whereby silicon tetrafluoride is reacted with magnesium hydride in a melt of alkali or alkaline earth halides under a hydrogen partial pressure which is greater than the dissociation pressure of the magnesium hydride at the temperature of the melt.
    Type: Grant
    Filed: March 1, 1985
    Date of Patent: November 18, 1986
    Assignee: D. Swarovski & Co.
    Inventor: Wolfgang Porcham
  • Process for producing silicon tetrafluoride
    Patent number: 4615872
    Abstract: A process for producing silicon tetrafluoride by hydrolysis of gases containing silicon fluoride, the hydrolysate being reacted with sodium fluoride, potassium fluoride and/or barium fluoride and the reaction product obtained decomposed thermally, thereby forming silicon tetrafluoride.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: October 7, 1986
    Assignee: D. Swarovski & Co.
    Inventor: Wolfgang Porcham
  • Method of treating the fluorine-containing mud produced by the acid polishing of lead glass so as to form basic lead carbonate
    Patent number: 4041127
    Abstract: A process is disclosed for the production of lead carbonate by treatment of fluorine-containing mud produced in the polishing of lead glass with etching acid comprising:A. separating said mud from the etching acid;B. reacting the same with an aqueous alkali carbonate solution and filtering the solution;C. dissolving the residue in nitric acid and precipitating the fluorides in the form of alkali hexafluorosilicates by the addition of alkali ions at a pH of the solution under 4 and filtering out the precipitate; andD. adjusting the pH of the resulting solution to above 6.5 by the addition of alkali carbonate to the solution to precipitate basic lead carbonate.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: August 9, 1977
    Assignee: D. Swarovski & Co.
    Inventor: Wolfgang Porcham