Patents by Inventor Hans-Georg Burckhardt

Hans-Georg Burckhardt 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).

  • Resistor composition and its use
    Patent number: 5244601
    Abstract: Resistor composition to produce thick film resistors, preferably the resistor films in sensors for temperature measurement, includes glass frit and an oxide which is at least one of CaCu.sub.3 Ru.sub.4 O.sub.12 and LaCu.sub.3 Ru.sub.4 O.sub.12.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: September 14, 1993
    Assignee: W. C. Heraeus GmbH
    Inventors: Hans-Georg Burckhardt, Frieder Gora, Karl-Heinz Guldner, Jurgen Dehoust, Christina Modes, Joachim Schmidt, Rainer Kiemel, Sybille Kemmler-Sack
  • Oxides of the pyrochlore family and electrically resistant materials that contain them
    Patent number: 5069824
    Abstract: Electrically conductive oxides of the pyrochlore family based on copper and/or silver, lead, bismuth, and ruthenium, characterized by the formula M.sub.x M'.sub.y (Pb,Bi).sub.2-x-y Ru.sub.2 O.sub.7-z, wherein M=copper and/or silver, M'=calcium, strontium, and/or barium, 0.ltoreq.x.ltoreq.0.6, 0.1.ltoreq.y.ltoreq.1.0, and 0.1.ltoreq.z.ltoreq.1.0.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 3, 1991
    Assignee: W.C. Heraeus GmbH
    Inventors: Inge Blanke, Hans-Georg Burckhardt, Frieder Gora, Karlheinz Guldner, Jurgen Dehoust, Christina Modes, Sybille Kemmler-Sack, Joachim Schmidt