Patents by Inventor Werner Kessl

Werner Kessl 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 producing cast iron
    Patent number: 4230490
    Abstract: A method for making cast iron containing globular or nodular graphite wherein molten iron is poured into magnesium or a magnesium master-alloy which is covered with particulate silicon carbide and iron chips. This covering results in minimization of the oxidation of the magnesium and is also advantageous in maintaining the temperature of the molten iron.
    Type: Grant
    Filed: May 16, 1978
    Date of Patent: October 28, 1980
    Inventor: Werner Kessl
  • Use of silicon carbide as an addition to cupola furnaces
    Patent number: 4171219
    Abstract: A method for the direct siliconization of cast iron wherein the charge contains a high percentage of steel scrap by adding to the charge pressed pieces of silicon carbide containing45-55% by weight SiC, 25-35% by weight Al.sub.2 O.sub.3, SiO.sub.2 and CaO (including cement as a binding agent in amounts of 10-25% by weight), having the following portions, computed as oxides:2-30% by weight Al.sub.2 O.sub.3,7-30% by weight SiO.sub.2,5-25% by weight CaO,5-25% by weight graphite,With the remainder being crystalline water and the usual impurities.The present process provides improved and more reliable control of the silicon yield and properties of the cast iron.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: October 16, 1979
    Inventor: Werner Kessl