Patents by Inventor Gerhard Lichtenegger

Gerhard Lichtenegger 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).

  • Process for manufacturing a cylindrical hollow body and hollow body made thereby
    Patent number: 7181847
    Abstract: Process for manufacturing cylindrical hollow bodies with a circular cross-section using solid rough material of corrosion-resistant, martensitic chromium steels. A remelting block is produced and a tube blank is made therefrom, the tube blank being formed into a tube at hot forming temperature by extrusion at a deformation ratio of at least 6. Hollow bodies are cut from the resultant tube.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: February 27, 2007
    Assignee: Boehler Edelstahl GmbH & Co. KG
    Inventors: Reinhold Schneider, Gerhard Lichtenegger, Günter Schirninger
  • Steel for plastic molds and process for their heat treatment
    Patent number: 6893608
    Abstract: Maraging steel with improved machinability, good weldability, and high corrosion resistance, a process for the heat treatment of such a steel, as well as its use. According to the invention this steel contains (in % by weight) 0.02-0.075% carbon; 0.1-0.6% silicon; 0.5-0.9% manganese; 0.08-0.25% sulfur; maximum 0.04%; phosphorus; 12.4-15.2% chromium; 0.05-1.0% molybdenum; 0.2-1.8% nickel; maximum 0.15% vanadium; 0.1-0.45% copper; maximum 0.03% aluminum; 0.02-0.08% nitrogen; as well as optionally one or more additional alloying elements up to maximum 2.0%, residual iron, and impurities caused in manufacturing, and a ferrite percentage in the structure of less than 28% by volume.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: May 17, 2005
    Assignee: Boehler Edelstahl GmbH
    Inventors: Klaus Sammt, Johann Sammer, Gerhard Lichtenegger
  • Steel for plastic molds and process for their heat treatment
    Publication number: 20020162614
    Abstract: Maraging steel with improved machinability, good weldability, and high corrosion resistance, a process for the heat treatment of such a steel, as well as its use. According to the invention this steel contains (in % by weight) 0.02-0.075% carbon; 0.1-0.6% silicon; 0.5-0.9% manganese; 0.08-0.25% sulfur; maximum 0.04%; phosphorus; 12.4-15.2% chromium; 0.05-1.0% molybdenum; 0.2-1.8% nickel; maximum 0.15% vanadium; 0.1-0.45% copper; maximum 0.03% aluminum; 0.02-0.08% nitrogen; as well as optionally one or more additional alloying elements up to maximum 2.0%, residual iron, and impurities caused in manufacturing, and a ferrite percentage in the structure of less than 28% by volume.
    Type: Application
    Filed: February 13, 2002
    Publication date: November 7, 2002
    Applicant: BOHLER EDELSTAHL GmbH
    Inventors: Klaus Sammt, Johann Sammer, Gerhard Lichtenegger
  • Process for manufacturing a cylindrical hollow body and hollow body made thereby
    Publication number: 20020104213
    Abstract: Process for manufacturing cylindrical hollow bodies with a circular cross-section using solid rough material of corrosion-resistant, martensitic chromium steels. A remelting block is produced and a tube blank is made therefrom, the tube blank being formed into a tube at hot forming temperature by extrusion at a deformation ratio of at least 6. Hollow bodies are cut from the resultant tube.
    Type: Application
    Filed: October 24, 2001
    Publication date: August 8, 2002
    Applicant: BOHLER EDELSTAHL GmbH & Co., KG.
    Inventors: Reinhold Schneider, Gerhard Lichtenegger, Gunter Schirninger