Adaptive anticipator mechanism for limiting room temperature swings
CA 2010935 C · Owner: Gas Research Institute · Inventors: Grald, Eric W.; Macarthur, J.Ward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adaptive cycle rate thermostat control. A thermostat including a switch and apparatus for heat anticipation operates responsively to an anticipator time constant. Apparatus for sensing room temperature provides an electronic signal proportional to the room temperature sensed. Apparatus for providing an activation signal to the switch responsive to the heat anticipation apparatus and sensed temperature cycles a variable-speed heat pump. Apparatus for modifying the anticipator time constant in response to room temperature swings provides the modified anticipator time constant to the heat anticipation means so as to keep room temperature swings within desirable limits while operating the …
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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 February 26, 1990 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2012.
- 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.