Patents by Inventor John F. Bortnik

John F. Bortnik 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).

  • System for recycling fines to hollow electrode
    Patent number: 4816230
    Abstract: The present invention is directed to process and apparatus for mixing finely divided calcium carbide and finely divided lime and carbonaceous material and for feeding the mixture down through the aperture of a hollow electrode in a calcium carbide electric furnace. In a preferred embodiment the finely divided calcium carbide is supplied to the aperture of the hollow electrode by a first conveyor and a fine feed mix of lime and carbonaceous material is supplied to the aperture of the hollow electrode by a second separate conveyor and the two are mixed in fluidized condition and fed down through the aperture of the electrode into the reaction zone of the furnace. Carbon monoxide off-gas from the furnace is preferably used for fluidizing the respective particles.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: March 28, 1989
    Assignee: Elkem Metals Company
    Inventors: John F. Bortnik, Donald A. Clayman, Scott A. Baker
  • System for recycling fines to hollow electrode
    Patent number: 4491568
    Abstract: The present invention is directed to process and apparatus for mixing finely divided calcium carbide and finely divided lime and carbonaceous material and for feeding the mixture down through the aperture of a hollow electrode in a calcium carbide electric furnace. In a preferred embodiment the finely divided calcium carbide is supplied to the aperture of the hollow electrode by a first conveyor and a fine feed mix of lime and carbonaceous material is supplied to the aperture of the hollow electrode by a second separate conveyor and the two are mixed in fluidized condition and fed down through the aperture of the electrode into the reaction zone of the furnace. Carbon monoxide off-gas from the furnace is preferably used for fluidizing the respective particles.
    Type: Grant
    Filed: June 1, 1983
    Date of Patent: January 1, 1985
    Assignee: Elkem Metals Company
    Inventors: John F. Bortnik, Donald A. Clayman, Scott A. Baker