Patents by Inventor Italo Letizia

Italo Letizia 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).

  • Rotating carbon or graphite electrode column to be used both in open- and submerged-arc furnaces
    Patent number: 4670884
    Abstract: In an arc furnace both of the open-air and submerged arc type an electrode column able to perform angular movements in one or in both directions alternatively about its axis during furnace operations and, at the same time, it can be moved vertically so as to allow the tip level to be changed as usual, as it is necessary in the furnace operation to achieve the best electric arc.
    Type: Grant
    Filed: September 17, 1985
    Date of Patent: June 2, 1987
    Inventors: Italo Letizia, Maurizio Lezzerini