Treatment of cigarette paper
CA 1211021 A · Owner: Cohn, Charles C. · Inventors: Cohn, Charles C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure One version of a fire resistant cigarette comprises a charge of tobacco in a low-porosity wrapper substantially free of burn accelerator. The sidestream smoke from this cigarette can be reduced by treating the wrapper with water or ethyl alcohol. Fire resistance is further improved by depositing a linear burn rate reducing substance on the paper from the group consisting of citric acid, magnesium citrate magnesium, acetate, tartaric acid, acetic acid lactic acid, a, sugar, non-fat milk and skim milk. Similar results are achieved with conventional medium to high porosity cigarette papers by treating them with a burn rate reducing substance from the same group. In …
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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 September 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 2003.
- 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.