Patents by Inventor Derrick E. Hilton

Derrick E. Hilton 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).

  • Shielding gas for electric arc welding
    Patent number: 4626646
    Abstract: A shielding gas for use in electric arc welding is disclosed. The gas comprises a mixture of helium, argon, 1.75% to 2.25% carbon dioxide and 0.25% to 1.0% oxygen (by volume). Use of the gas enables slag-free welds which accept readily paint applied by an electrostatic deposition process.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: December 2, 1986
    Assignee: BOC Limited
    Inventor: Derrick E. Hilton