Patents by Inventor John C. d'Entremont

John C. d'Entremont 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).

  • Patent number: 3947267
    Abstract: An economical process for making a molten ferrous alloy containing from about 5.0% to about 30.0% by weight chromium and from 0% up to about 25.0% by weight nickel. The process comprises four basic operations:1. partially reducing chrome ore and iron ore and (depending upon the type or reducing process used) converting the ores before, during or after the reducing step into an appropriate physical form for charging into a submerged-arc furnace;2. preparing a charge consisting primarily of the reduced chrome and iron ores (preferably still hot from the reducing step) and smelting and reducing this charge by the submerged-arc process in a first vessel to yield an unrefined chrome alloy high in carbon and silicon;3. transferring the molten alloy from the first vessel to a second vessel and directing gaseous oxygen thereagainst to reduce the carbon and silicon content thereof; and4.
    Type: Grant
    Filed: June 19, 1974
    Date of Patent: March 30, 1976
    Assignee: Armco Steel Corporation
    Inventors: John C. d'Entremont, Charles R. Taylor