Temperature insensitive calibration system
CA 2071540 A1 · Owner: Deetz, David W. · Inventors: Morris, Russel L.; Deetz, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-phase control and/or calibration system consists of a first non-aqueous liquid phase containing an amount of dissolved oxygen (O2) in which the O2 partial pressure is made relatively temperature insensitive over an ambient temperature range of interest, a second aqueous, solution, immiscible with the first solution phase and containing an amount of dissolved carbon dioxide (CO2) and one or more solute species that provide temperature stability with respect to the partial pressure of CO2 over the ambient temperature range of interest. The liquid phases are in equilibrium with a vapor phase and the system may be sealed with a storage atmosphere.
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 October 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.