Patents by Inventor Lorenz Dotsch

Lorenz Dotsch 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).

  • Gas purging device
    Patent number: 5437435
    Abstract: The present invention pertains to a gas purging device for introducing gases and/or solid reactants into the metal melt of a metallurgical crucible, consisting of a gas purging plug, a well nozzle sleeve surrounding it, and/or a well nozzle surrounding the plug or the nozzle brick, with a mounting device arranged in the area of the respective end face.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: August 1, 1995
    Assignee: Radex-Heraklith Industriebeteiligungs Aktiengesellschaft
    Inventors: Lorenz Dotsch, Karl-Heinz Hofer, Helmut Preyer
  • Process for producing a gas purging plug with increased resistance to infiltration and oriented porosity
    Patent number: 5225247
    Abstract: A process for producing a plug with increased resistance to infiltration and oriented porosity for use in metallurgical melting crucibles, in which the matrix material of the plug is subjected to an impregnating treatment.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: July 6, 1993
    Assignee: Radex-Heraklith Industriebeteiligungs Aktiengesellschaft
    Inventors: Lorenz Dotsch, Helmut Preyer, Frich Renfordt, Jean-Louis Retrayt
  • Procedure for manufacturing of fireproof ceramic molded parts
    Patent number: 5124099
    Abstract: The invention concerns a procedure for manufacturing fireproof ceramic molded parts, particularly of high alumina content based materials.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: June 23, 1992
    Assignee: Radex-Heraklith Industriebeteiligungs Aktiengesellschaft
    Inventors: Uwe Schatz, Lorenz Dotsch, Andreas Batton, Jens Decker, Orfwin Rave, Helmut Schuller
  • Process for producing carbon-bonded refractory ceramic moldings
    Patent number: 5102593
    Abstract: A process for producing refractory, carbon-bonded ceramic moldings includes spraying a low-viscosity organic containing carbon containing binder onto a coarse fraction of a refractory component, the coarse fraction having a particle size larger then 0.5 mm while maintaining the coarse refractory fraction having a particle size smaller then 0.5 mm onto the coated granules, pressing the granules thus produced into moldings, and subsequently curing the organic binder in the moldings, and tempering or firing the moldings.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: April 7, 1992
    Assignee: Radex-Heraklith Industriebeteiligungs Aktiengesellschaft
    Inventors: Lorenz Dotsch, Helmut Schuller, Andreas Batton, Jens Decker
  • Flushing block
    Patent number: 4944497
    Abstract: The invention relates to a flushing block for introducing gaseous and/or solid reagents and additives into a metallurgical melting vessel, which is connectable at one end to a gas pipe and at least to a drive means and at its other end has at least one outlet opening extending from its circumferential surface, said opening terminating in at least one gas channel which can be connected to the gas pipe.
    Type: Grant
    Filed: March 21, 1989
    Date of Patent: July 31, 1990
    Assignee: Radex-Heraklith Industriebeteilgungs AG
    Inventors: Bernd Grabner, Lorenz Dotsch, Josef Knauder, Hans Hoffgen