Thermal storage reservoir for ice rink
CA 2273760 C · Owner: Frontier Refrigeration And Air Conditioning Ltd. · Inventors: Jorgensen, Greg S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ice rink is provided having a thermal storage reservoir arranged to regulate the temperature of the ice rink. The ice rink includes a sheet of ice and a sub-floor for supporting the sheet of ice thereon. The reservoir is mounted adjacent a bottom face of the sub-floor. The reservoir is substantially larger in volume than the sheet of ice being filled with particulate material having a high heat capacity. A fluid surrounds the particulate material having a freezing point which is below that of water. Cooling pipes extending through the reservoir and the sub-floor are arranged to have cooling fluid pumped therethrough for freezing the sheet of ice mounted thereon.
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 June 4, 1999 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2021.
- 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.