Apparatus for measuring physical properties of fluids_
CA 2073688 A1 · Owner: Cossonay Meteorology Systems Sa · Inventors: Favre, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus is comprised of two sensors of the thermal type (11a 11b) made of materials resisting without any alteration to a temperature of 650 DEG C. Probes (15a 15b) are controlled by a microprocessor (16) to come periodically and momentarily in contact with said sensors in order to calculate (through microprocessor (16)) the thermal time constant of said sensors presenting a deposition layer of environmental pollutants. The microprocessor (16) compares the value of said time constant with an order value that commands the closure of a shunt switch (17) of a resistance (18) which when short-circuited, determines a reinforced heating of the sensors to bring them to a temperature of …
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 November 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2013.
- 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.