Patents by Inventor Friedrich Priehs

Friedrich Priehs 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).

  • Patent number: 5709229
    Abstract: The invention relates to a method of producing a tobacco product for smoking. In order to develop a novel tobacco product for smoking, the following method steps are proposed:a) a mixed mass of tobacco particles, starch or a starch-containing product as binder, and additives is produced;b) the mixed mass is compressed and plasticized in an extruder by the application of thermal and mechanical energy;c) pressurized steam is forced through the mixed mass so as to form channels;d) on leaving the extruder, the plasticized mixed mass, rendered porous by the channels, is expanded or foamed by the drop in temperature and pressure, hardened as a continuous, porous, cylindrical rod and cut to the desired lengths.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: January 20, 1998
    Assignees: Friedrich Priehs, H.F. & Ph.F. Reemtsma GmbH & Co.
    Inventors: Friedrich Priehs, Dietrich Mueller