Patents by Inventor Alan J. Herd

Alan J. Herd 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 mixtures
    Patent number: 4147172
    Abstract: A smoking material in film form comprising a film-forming binder, inorganic filler and a smectite, particularly a bentonite, which smectite is finely dispersed throughout the material. Fine dispersion is achieved by high energy input during mixing with water, and results in improved ash coherence and greater combustion retardance by the smectite. The materials are characterized by relatively low air porosity.
    Type: Grant
    Filed: June 14, 1977
    Date of Patent: April 3, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventors: Alan Calder, Alan J. Herd