Electric water heater with improved heating element
CA 2272981 A1 · Owner: American Water Heater Company · Inventors: Shellenberger, Timothy J.; Krell, Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A water heater heating element including a base member adapted to extend through, and sealingly engage a wall of a water heater tank the base member having a , recess; a, thermistor positioned in the recess; members connected to the thermistor and extending, outwardly of the base member to transmit temperature information; a sheathing sealed to, and extending outwardly from the base member; a heating coil positioned within the, sheathing; cold pins connected to opposed ends of the heating coil and to the base, member, the cold pins being sufficiently long that heat generated by the heating coil is, not detected by the thermistor; and members connected to the cold pins and extending, …
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 May 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 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.