Humidity-modulated dual-setpoint temperature controller
CA 2277324 A1 · Owner: Tennant, James A. · Inventors: Tennant, James A.; Khadkikar, Prasad S.; Zimmermann, Bernd D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A humidity-modulated dual-setpoint temperature controller is disclosed in which the two, setpoints of the temperature controller are adjusted as a function of measured humidity. Parameters other than humidity could also be used to adjust the dual setpoints of the temperature, controller. The controller is particularly useful in controlling the heater element of a clothes dryer, in order to improve the energy efficiency of the dryer.
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 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 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.