Patents by Inventor Edwin Harm Roos

Edwin Harm Roos 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).

  • Arc furnace protection
    Patent number: 6246712
    Abstract: An arc furnace which includes a shell with a hearth, a roof for the shell, the roof including a plurality of segments which are substantially electrically isolated from each other and from the shell, an electrode and a refractory section on the roof, and wherein the refractory section is at least partly electrically conductive.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: June 12, 2001
    Inventors: Rodney Murison Whyte, Edwin Harm Roos, Andrew Bryan Johnston, Jan Abraham Ferreira, Dirk Renaat Gabriel Faveere, Anthony Wayne Wewege