Patents by Inventor Edwin R. Dunstan, Jr.

Edwin R. Dunstan, Jr. 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).

  • Fly ash-based cement
    Patent number: 4256504
    Abstract: A cement composition comprising a high calcium-content fly ash and calcium sulfate, and mortar and concrete compositions containing the cement.
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: March 17, 1981
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventor: Edwin R. Dunstan, Jr.