Cigarette structure
CA 2076242 A1 · Owner: Rothmans, Benson & Hedges Inc. · Inventors: Kaczmarek, Peter P.; Black, Gary D.; Vassalakopulos, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel smoking article comprises in assembled form, a preformed paper tube which usually has a tobacco smoke, filter at one end and a plain-ended tobacco rod which is inherently smokeable, usually a cigarette rod which is, inherently smokeable. The tobacco rod has external transverse dimensions and length correlated to the internal transverse dimensions and length of the preformed paper tube, so as to be received in substantially snug fit relation thereto. A kit for the assembly of smoking articles is provided, comprising preformed paper tubes and a plain-ended tobacco rod which is inherently smokeable and has external transverse dimensions correlated to the internal transverse dimensions …
Read the whole patent
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
- Filed August 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.