Expired Canadian patentCanada
Dry powder and liquid method and apparatus for extinguishing fire
CA 2062864 C · Owner: Williams, Leslie P. · Inventors: Williams, Leslie P.; Williams, Dwight P.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for extinguishing fires by simultaneously applying a spray of dry powder and liquid/liquid-foam including a nozzle for the , simultaneous spray of powder and liquid.
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 March 12, 1992 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.
FiledMarch 12, 1992
GrantedDecember 3, 2002
Term endedMarch 12, 2012
Patent numberCA 2062864 C
Classification (IPC)A62C31/02 +2 more
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.