Patents by Inventor Richard M. Charnah

Richard M. Charnah 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).

  • Dry powder compositions of vermiculite lamellae and additives
    Patent number: 4324838
    Abstract: A free-flowing, dry powder composition comprising vermiculite lamellae (delaminated vermiculite); preferably the composition contains a solid particulate additive such as magnesium oxide.
    Type: Grant
    Filed: August 14, 1979
    Date of Patent: April 13, 1982
    Assignee: Imperial Chemical Industries Limited
    Inventors: Denis G. Ballard, Richard M. Charnah, John F. Droughton, Graham R. Rideal