Fire-extinguishing agent, water for fire extinguishing, and method of fire extinguishing
CA 2413152 A1 · Owner: Maruyama, Takashi · Inventors: Maruyama, Takashi; Kashiki, Keizou; Sumitani, Masatoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fire-extinguishing agent which, when used in extinguishing a fire readily , holds and solidifies water by the action of the heat of the fire and adheres to the burning object to thereby extinguish the fire or prevent the fire from spreading; water for fire extinguishing; and a method of fire extinguishing using the water for fire extinguishing. The fire-extinguishing agent comprises a temperature-sensitive polymer which is water-soluble at temperatures not higher than a specific set temperature and which when heated to a temperature , not lower than the set temperature i.e. heated by the heat of a fire, holds water and causes the water to gel or solidify. The water for fire …
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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
- Filed April 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2023.
- 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.