Process for preparation of aroma substances ii
CA 1159641 A · Owner: B.A.T. Cigaretten-Fabriken G.M.B.H. · Inventors: Heemann, Volker; Bruemmer, Ursula
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aroma substances for tobacco which have improved aroma characteristics are obtained by preparing an alcoholic extract which contains carotenoids and has been isolated from fresh tobacco plants and from which the diterpene components have been removed and/or other, xanthophyll-containing plant extracts and oxidising, these extracts in alcoholic solution with oxygen under, irradiation with UV light.
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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 January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- 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
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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.