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Expired Canadian patentCanada

Ventilated mouthpiece for a smoking article

CA 1208517 A · Owner: Brown & Williamson Tobacco Corporation · Inventors: Sanford, Robert A.; Cantrell, Daniel V.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A ventilated mouthpiece adapted to be attached to a smoking article, such as a cigarette, includes a generally cylindrical core member of smoke and air impermeable material having a smoke inlet end and a mouth end. The smoke inlet end is to be placed in juxtaposition to one end of the tobacco column of the cigarette. The core member is formed with a plurality of smoke flow capillaries therethrough for delivering unfiltered smoke from the tobacco column to the mouth end of the core member, and a plurality of ventilation air flow channels which receive ambient ventilation air and delivers the ventilation air to the mouth end of the core member. The smoke outlets from each of the smoke flow …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted July 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 9, 1984
GrantedJuly 29, 1986
Term endedJuly 29, 2003
Patent numberCA 1208517 A
Classification (IPC)A24D3/00 +1 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedMay 9, 1984Patent grantedJuly 29, 1986Term endedJuly 29, 2003

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.