Patents by Inventor Glenn W. Sheffield

Glenn W. Sheffield 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).

  • Manganese dioxide
    Patent number: 4277360
    Abstract: A homogeneous manganese dioxide composition having on a microscopic scale domains of alpha and delta manganese dioxide is manufactured by reacting a manganese-oxygen containing composition with a sodium containing composition at elevated temperature followed by acid treatment.
    Type: Grant
    Filed: March 28, 1979
    Date of Patent: July 7, 1981
    Assignee: Union Carbide Corporation
    Inventors: Geoffrey W. Mellors, Glenn W. Sheffield