Patents by Inventor Robert W. Levis

Robert W. Levis 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).

  • Protective atmosphere process for annealing and or spheroidizing ferrous metals
    Patent number: 4359351
    Abstract: Methanol and nitrogen are injected into a furnace utilized for annealing or spheroidizing metal articles. The methanol reacts inside the furnace to provide an atmosphere with a carbon potential that will minimize or prevent carbon removal or carbon addition to the surface of the ferrous metals being treated.
    Type: Grant
    Filed: October 23, 1979
    Date of Patent: November 16, 1982
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Robert W. Levis