Smoking product containing nicotine n'-oxide
CA 1249831 A · Owner: B.A.T. Cigarettenfabriken G.M.B.H. · Inventors: Schmekel, Gerald; Rudolph, Gert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Smoking products for example cigarettes, cut, tobacco, pipe tobacco and cigarillos give an increased, yield of nicotine in tobacco smoke without impairment of the taste of the smoke, when trans-nicotine N'-oxide which, is free or substantially free of cis-nicotine N'-oxide or contains at most 10% by weight of the cis-isomer is added, thereto in a quantity of up to 5% by weight relative to, the dry weight of the tobacco.
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
- Granted February 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2006.
- 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.