Patents by Inventor Karl Blum

Karl Blum 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).

  • Halogen incandescent lamp with single halogenated hydrocarbon fill component
    Patent number: 4777404
    Abstract: To prevent carburation of a tungsten filament, the fill within the bulb is ormed by an inert gas, for example xenon or krypton, and an additive which is formed by a single halogenated hydrocarbon in which iodine is bound, and further includes at least one atom of bromine or chlorine; suitable additives are: CH.sub.2 ClI, CHCl.sub.2 I, CHClI.sub.2, CHClBrI, CH.sub.2 BrI, present in from between about 1.times.10.sup.-8 to 5.times.10.sup.-6 mol per cm.sup.3 of the internal volume of the bulb; particularly preferred are chlor iodine methane (CH.sub.2 ClI), present in about 1-3.times.10.sup.-7 mol per cm.sup.3 of the internal volume of the bulb.
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: October 11, 1988
    Assignee: Patent Treuhand Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Rolf Kiesel, Karl Blum