Patents by Inventor Andreas Stathopoulos

Andreas Stathopoulos 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).

  • Cigarette and filter therefor
    Patent number: 5107863
    Abstract: A cigarette filter 12 comprises a rod of filter material having an inner zone 16 of 60% to 90% filter efficiency and an outer zone 18 of 10% to 40% filter efficiency, the inner zone occupying from 30% to 60% of the cross-sectional area of the filter. The filter is attached to a tobacco rod 10 by a tipping 14 having perforations 24 admitting air into the filter.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: April 28, 1992
    Assignee: Fabriques de Tabac Reunies, S.A.
    Inventors: Urs Nyffeler, Roger S. Slagle, Andreas Stathopoulos