Hot loop water supply apparatus
CA 2047987 A1 · Owner: Stephen, Frank R. · Inventors: Stephen, Frank R.; Braham, George D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hot loop water supply apparatus comprises a heating vessel, an electric heater to heat the water in the heating vessel, a hot water outlet from near the top of the vessel, a hot water return inlet to return hot water to near the bottom of the heating vessel, a hot water loop interconnecting the hot water outlet and the hot water return inlet and arranged to feed hot water to single lever mixer taps provided around the loop and recirculate hot water from the hot water outlet to the hot water return inlet, a thermostat in the heating vessel controlling the electric heater and set at a predetermined temperature to maintain the water in the heating vessel and the hot water loop at a …
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 July 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2013.
- 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.