Patents by Inventor Stewart K. Mehlman

Stewart K. Mehlman 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).

  • Rapid decarburization steelmaking process
    Patent number: 4488903
    Abstract: A decarburization procedure for rapidly decarburizing a steel melt comprising top injection of oxygen and powdered lime and bottom injection of oxygen and inert gas, discontinuance of the top injection at a specified time, and decarburization to the aim carbon content by the bottom injection.
    Type: Grant
    Filed: March 14, 1984
    Date of Patent: December 18, 1984
    Assignee: Union Carbide Corporation
    Inventor: Stewart K. Mehlman
  • Process to produce low hydrogen steel
    Patent number: 4436553
    Abstract: Steel is produced by the argon-oxygen decarburization process which has a low hydrogen content, generally below 2 ppm.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: March 13, 1984
    Assignee: Union Carbide Corporation
    Inventors: Rockne J. Andreini, Stewart K. Mehlman, Ronald J. Selines, Balkishan Agrawal
  • Method for preventing slopping during subsurface pneumatic refining of steel
    Patent number: 4278464
    Abstract: The desired tap temperature may be obtained, without slopping, during subsurface pneumatic refining of steel by the addition to the melt of an oxidizable fuel material, such as aluminum, after decarburization has been substantially completed or after the carbon content has fallen below 0.50%.
    Type: Grant
    Filed: December 27, 1979
    Date of Patent: July 14, 1981
    Assignee: Union Carbide Corporation
    Inventors: Roland P. Bury, Stewart K. Mehlman, Rockne J. Andreini
  • Method for controlling the temperature of the melt during pneumatic refining of steel
    Patent number: 4187102
    Abstract: The method enables the desired tap temperature to be obtained during subsurface pneumatic refining of carbon steel or low alloy steel, without the need to reblow the heat, by adding to the melt, before starting the injection of refining oxygen, a fast oxidizing element such as aluminum, and a slow oxidizing element, such as silicon. The amount of fast oxidizing element added is such that the total amount thereof in the melt is sufficient, when oxidized, to raise the temperature of the melt to the desired temperature before substantial decarburization begins, and the amount of slow oxidizing element added is such that the total amount thereof is sufficient, when oxidized, to maintain the temperature of the melt within the desired temperature range during the decarburization period.
    Type: Grant
    Filed: August 24, 1978
    Date of Patent: February 5, 1980
    Assignee: Union Carbide Corporation
    Inventors: Richard J. Choulet, Stewart K. Mehlman