Supercritical conditioned gas mixture containing co2, no and optionally a neutral gas
CA 2320936 A1 · Owner: L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Briend, Robert; Monnot, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a conditioned NO/CO¿2? mixture containing at least nitric oxide (NO) and carbon dioxide (CO¿2?) characterised in that it is in supercritical state. Preferably said NO/CO¿2? mixture pressure is higher than about 73.10?5¿ Pa at 304.21 K. The invention also concerns a pressurised container such as a gas cylinder, containing such a supercritical NO/CO¿2? mixture and a method for expanding such NO/CO¿2? mixture to ensure a constant concentration in NO while the gas cylinder is being emptied.
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 February 26, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2021.
- 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.