Fire retarding and extinguishing composite
CA 2084617 C · Owner: Du, Huanwen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a fire retarding and extinguishing composite; more specifically a liquid, fire retarding and extinguishing composite for extinguishing fires caused by classes B and A materials and flammable organic solvents. The fire retarding and extinguishing composite of the present invention comprises: (a) an aqueous extract of plant ash and at least one plant selected from the group consisting of plants of Sapindaceae, Compositae, Cruciferae, Leguminosae root skin, of Ulmaceae, Phytolaccaceae and cotton seed; and (b) at least one surfactant, in an amount of 30-60 percent by weight of the weight of the aqueous extract of plant.
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 December 4, 1992 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2014.
- 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.