Lighting briquette
CA 2114670 C · Owner: Les Ateliers Leopold Desrosiers Inc. · Inventors: Labonte, Nelson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Among items used to start a fire, the usual practice is to use newspaper birch bark, kindling, often with a petroleum activator added in. It is acknowledged that the efficacy of known combustion devices is a function not only of their composition but also of the way in which they are placed on the substance to be lit in order to allow air to flow through to maintain the flame. In this invention the lighting device is made of several sheets of corrugated cardboard superposed on one another and held together with glue to form a briquette which is then impregnated with paraffin wax or vegetal or animal fat. The use and distinctiveness of this invention results from the fact that the placement …
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
- Filed February 1, 1994 and granted October 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 1, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2016.
- 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.