Air heating system
CA 2242829 C · Owner: Thermolec Ltee. · Inventors: Menassa, Cherif
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air heating system includes a duct containing an electric heating coil and a thermistor which is part of an electronic thermostat for controlling the heating coil. The thermistor is so located as to be directly exposed to heat radiated by the heating coil. The thermistor in effect, acts as an airflow sensor so that the heating coil will gradually cool down and eventually shut off according to the air velocity in the duct. Heating is restored automatically once airflow in the duct has sufficiently cooled down the thermistor. Thus the thermistor acts as an airflow sensor to modulate the heating capacity according to the quantity of air flowing through the duct. The heating system can be …
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 10, 1998 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2020.
- 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.