Heating and cooling system
CA 2082718 C · Owner: Clark, Steven J. · Inventors: Clark, Steven J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for heating and cooling a building is disclosed. A watercooler and a cold-water pump continuously circulates cold water through a fire sprinkler piping system. A waterheater and a hot-water pump circulates hot water through adomestic hot-water piping system. A plurality of fan-coil assemblies located throughout the building may access either the cold water flowing in the fire sprinkler piping system or the hot-water in the domestic hot-water piping system. The fan-coil assemblies include a fan and a coil. Depending upon whether hot water or cold water is flowing through the coil air circulated by said fan may be, heated or cooled for climate control.
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 November 12, 1992 and granted April 29, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 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.
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.