Process and apparatus for the separation of air by cryogenic distillation
CA 2324642 A1 · Owner: L'Air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Lehman, Jean Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a separation apparatus, a stream of liquid 33 partially vaporizes in an exchanger 9 before being sent to a phase separator 37. The liquid stream from the phase separator is divided into a first portion which is taken off and a second portion which is mixed with the liquid 33 to be vaporized.
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 27, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 27, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2022.
- 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.