Patents by Inventor Lester W. Harriman

Lester W. Harriman 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).

  • Removal of copper containing incrustations from ferrous surfaces
    Patent number: RE30714
    Abstract: .Iadd.The invention concerns a method of removing copper from a ferrous metal surface without excessive corrosion of the ferrous metal surface. In the method, the copper is dissolved with an aqueous alkaline solution containing a ferric chelate of an alkylene polyamine polyacetic acid chelating agent. .Iaddend.
    Type: Grant
    Filed: September 14, 1978
    Date of Patent: August 18, 1981
    Assignee: The Dow Chemical Company
    Inventors: Lester W. Harriman, Paul E. Muehlberg, Fred N. Teumac