Patents by Inventor Robert A. Featherstone

Robert A. Featherstone 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).

  • Process for decarburizing ferro-manganese
    Patent number: 4192675
    Abstract: Ferro-manganese is decarburized from a carbon content of as high as 7.5% down to 2% or less by blowing an oxidizing gas into the melt in two stages through one or more immersed tuyeres protected with a peripheral fluid introduced into said tuyeres, utilizing temperatures between 1650.degree. and 1750.degree. C.
    Type: Grant
    Filed: December 28, 1978
    Date of Patent: March 11, 1980
    Assignees: S.A. Manganese Amcor Ltd., Creusot-Loire
    Inventors: Robert A. Featherstone, Paul P. Roos, Willem A. Gericke, Jean Saleil, Pierre J. Leroy, Jean-Marcel Masson