Patents by Inventor Robert Kinsey Dart

Robert Kinsey Dart 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).

  • Tobacco smoke filters and filter rods therefor
    Patent number: 5664586
    Abstract: The invention provides a cigarette filter (1) the biodegradation of the material (3) which is assisted by the incorporation of swellable means in the filter so that upon exposure to moisture the volume of the filter is increased, preferably to the extent of breaking open a filter wrap (2) which enclosed it.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: September 9, 1997
    Assignee: Rothmans International Services Limited
    Inventors: Neil Murray Sinclair, Robert Kinsey Dart