Tabacco drying process
CA 1105344 A · Owner: Brown & Williamson Tabacco Corporation · Inventors: Canon, Ardath B.; Jewell, John N.; Newton, Richard P. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure is of a process for reducing the moisture content of expanded tobacco while minimizing yield losses and reducing particle lamination while maintaining filling power. The process comprises drying the expanded tobacco at a temperature within the range of from about 250°F. to about 650°F. in the presence of an absolute humidity at a level above that which will provide a wet-bulb temperature of at least about 150°F. -1-
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 July 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 1998.
- 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.