Patents by Inventor Paul J. Schaffer

Paul J. Schaffer 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).

  • Tuyere and method for discharging gas into a furnace
    Patent number: 5171511
    Abstract: A tuyere and method for discharging an agitating gas into the molten contents of an electrically heated furnace to reduce temperature and composition variations in its contents. The tuyere comprises a refractory plug and sleeve for installation into the refractory wall and shell of the furnace, and a dielectric section in the tuyere pipe outside the furnace shell to prevent electrical arcing and current flow into the gas supply piping and external supports.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: December 15, 1992
    Assignee: Union Carbide Industrial Gases Technology Corporation
    Inventors: Sudhir K. Sharma, Ronald J. Selines, Michael F. Riley, Alan R. Barlow, Allen H. Chan, Paul J. Schaffer
  • Wear resistant metallurgical tuyere
    Patent number: 4898368
    Abstract: A tuyere having improved wear resistance at the tip, and a refractory walled metallurgical vessel incorporating the tuyere, characterized by an oxide thermal barrier coating on the outer surface of the outermost conduit of the tuyere having a thermal conductivity less than that of the refractory.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: February 6, 1990
    Assignee: Union Carbide Corporation
    Inventors: Paul J. Schaffer, Robert C. Tucker, Jr.