Controls for water heating appliances
CA 2066474 A1 · Owner: Waggott, Alan · Inventors: O'Neill, Robert A.; Gaeta, Antonio M.; Waggott, Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrically heated water boiling appliance is arranged to be capable of selectively providing boiling water and water at a predetermined lower temperature (suitable for example for making coffee). The appliance has a first thermally-responsive switch which is arranged to be exposed to steam generated when water boils in the appliance so as to cut off the supply of electrical energy to the heating element of the appliance, a second thermally-responsive switch connected in series with the first switch and arranged to cut off the supply to the heating element at a predetermined lower temperature, and a manuallyoperable selector switch for taking the second switch out of circuit when it is …
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 April 21, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 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.