Pyrolyzing apparatus for determining particulate matter in tobacco smoke
CA 1067720 A · Owner: Imperial Group Limited · Inventors: Long, Terence M.; Henneveld, Clifford H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for determining the total particulate matter in tobacco smoke comprises a reusable cartridge for holding a charge of tobacco, a pump for drawing air through the tobacco charge and through a filter, a heater to ignite the tobacco charge and, control means operable to control the heater and pump to ignite the tobacco charge, draw air continuously through the charge until it has been consumed, and thereafter reset the apparatus for consumption of a further charge of 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 December 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 1996.
- 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.