Novel smoking product
CA 2057962 C · Owner: Bowen, Larry · Inventors: Bowen, Larry; Black, Gary D.; Daoust, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel reconstituted tobacco sheet material is provided which is useful in providing a novel smoking product which has a smoking quality closely approximating that of cigarettes having conventional paper wrappers. The reconstituted tobacco sheet is prepared by a paper-making process in which the water-soluble material extracted in the paper-making process is not added back to the sheet, or if added back to an, extent of no more than 20 wt % of the reconstituted tobacco sheet. In the novel smoking product a tobacco, filler rod is enclosed within an outer wrapper which, usually comprises an inner binder layer and an outer wrapper layer, one or both formed of reconstituted tobacco sheet …
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 December 24, 1991 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2013.
- 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.