Patents by Inventor William John Stone

William John Stone 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 dryers
    Patent number: 6185843
    Abstract: A pneumatic conveyance tobacco dryer which includes a conveyance duct having a first portion, a second, upwardly extending portion and a third, curved portion intercommunicating the first and second portions. A tobacco feed chute extends downwardly and opens into the second portion of the duct. The geometry of the dryer at and in the region of the feed chute is such as to effect the object of reducing the contact of tobacco particles with the inner surfaces of the conveyance duct.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: February 13, 2001
    Assignee: British American Tobacco (Investments) Limited
    Inventors: William John Stone, Ian Ernest Tatham, Werner Hirsch, Arno Eugen Weiss
  • Making tobacco rod
    Patent number: 5649553
    Abstract: The invention provides a method of making tobacco rod in which method the tobacco filler material of the rod is subjected to radio frequency heating before feeding to a rod making machine. The elevated temperature increases the pliability of the tobacco filler, thus reducing its degradation in the rod making machine and enhancing the physical properties, e.g. ends stability, of the tobacco rods thus produced.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: July 22, 1997
    Assignee: British-American Tobacco Company Limited
    Inventors: Santosh Kumar Pillai, William John Stone