Smoking mixtures
CA 1056588 A · Owner: Imperial Chemical Industries Limited · Inventors: Herd, Alan J.; Calder, Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A smoking material in film form comprising a filmforming binder, inorganic filler and a smectite perticularly, a bentonite, which smectite is finely dispersed throughout the material. Fine dispersion is achieved by high energy input during mixing with water, and results in improved ash coherence and greater combustion retardance by the smectite. The materials are characterised by relatively low air porosity.
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 June 19, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 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.