Patents by Inventor M. Dewayne Coffey

M. Dewayne Coffey 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).

  • Method and composition for corrosion
    Patent number: 4493775
    Abstract: An improved composition for inhibiting the corrosion of ferrous metals in acidic environments, especially in the presence of H.sub.2 S.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: January 15, 1985
    Assignee: The Dow Chemical Company
    Inventors: M. Dewayne Coffey, Mary Y. Kelly, Weldon C. Kennedy, Jr.