Patents by Inventor Robert D. Cowling

Robert D. Cowling 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).

  • Smoking materials
    Patent number: 4286604
    Abstract: The invention is concerned with a tobacco substitute which is made by subjecting a strand of viscose fibres to a controlled pyrolysis until the organic residue contains at least 90% carbon by weight, and loading the carbon strand with ingredients for smoking.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: September 1, 1981
    Assignee: Gallaher Limited
    Inventors: Jacques Ehretsmann, Robert D. Cowling, Alfred D. Schweizer, William M. Caldwell, Dennis F. Boyd, Robert J. Boyd