Dry sprinkler
CA 2409278 A1 · Owner: National Foam, Inc. · Inventors: Ballard, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dry sprinkler comprises a tubular body having a connector and a sprinkler head. The connector is adapted to be connected to the water pipe network of the fire suppression, system and the sprinkler head is adapted to discharge water or other liquid suppressant. The, tubular body defines a flow passage between the connector and the sprinkler head. First and, second seals are arranged in spaced relation along the flow passage and contain an antifreeze, fluid therebetween. The antifreeze fluid may be a liquid or gas subjected to pressure. A, thermally responsive element is arranged to maintain the second seal in a state that contains, the antifreeze fluid between the first and second …
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 October 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2024.
- 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.