Patents by Inventor Georg Frommeyer

Georg Frommeyer 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).

  • Patent number: 6197089
    Abstract: The invention relates to activated magnesium metal, to a method of activating magnesium metal and to its use for the preparation of organomagnesium compounds. The activated magnesium metal is obtainable by reacting molten magnesium metal with magnesium hydride; or by heating a mixture of magnesium metal and magnesium hydride until molten.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: March 6, 2001
    Assignee: Goldschmidt, A.G
    Inventors: Georg Frommeyer, Wilfried Knott, Andreas Weier
  • Patent number: 5944914
    Abstract: The invention relates to an aluminothermic mixture consisting of a finely particulate base portion of iron oxides and aluminum as well as metallic additives, wherein a master alloy, namely a ferrochromium alloy consisting of (in % by weight)C: 0.1 to 20Si: 2 to 40Cr: 5 to 80and iron with impurities resulting from manufacture and, if appropriate, other alloying elements, is added in a quantity of from 5 to 50% by weight, relative to the base portion, as metallic additive.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: August 31, 1999
    Assignee: Elektro-Thermit GmbH
    Inventors: Georg Frommeyer, Michael Kulse, Gerhardus Mulder, Michael Steinhorst
  • Patent number: 5141703
    Abstract: In a fusion-metallurgical process of producing fine-grained hereogeneous, ductile alloys which contain Mg.sub.2 Si, the grain size of the Mg.sub.2 Si crystallites formed by primary solidification is kept below 30 .mu.m by doping the molten alloy with 0.05 to 2% by weight of phosphorus.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: August 25, 1992
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Eberhard E. Schmid, Kersten V. Oldenburg, Georg Frommeyer
  • Patent number: 5028386
    Abstract: In a process for making tools from medium and high alloy steels or stellites by superplastic precision forming a powder metallurgically produced starting material with an equiaxed structure and more than 30% by volume of carbidic and/or boridic precipitated phase of particle size 1 to 0.2 .mu.m is given a matrix grain size of 1 to 3 .mu.m by thermomechanical processing (hot forming) and formed in the superplastic state.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: July 2, 1991
    Assignee: Robert Zapp Werkstofftechnik GmbH & Co. KG
    Inventor: Georg Frommeyer