Model-based thermobalance with feedback
CA 2121247 C · Owner: Drees, Kirk H. · Inventors: Drees, Kirk H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A temperature control system (18) and method for maintaining the temperature of air within an air pressure controlled enclosure (10) at a desired temperature (Troom-setpoint). The system uses an energy flow model to determine the temperature to which the air supplied to the enclosure (10) must be heated to attain the desired temperature within the enclosure. The energy flow model determines the desired supply air temperature based on the temperature (Ts) and flow rate (CFMs) of the supply air, the current temperature (Tr) of the air in the enclosure, the heat transfer rate within the enclosure, and the temperature and flow rate of make-up air (16) entering the enclosure (10).
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 June 25, 1993 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2015.
- 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.