Fast response high purity membrane nitrogen generator
CA 2104808 C · Owner: L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Proced Es Georges Claude · Inventors: Barbe, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for generating a nitrogen-enriched gas from a feed stream of atmospheric air or a mixture of nitrogen which is not continuously supplied to a membrane system which, membrane system comprises a non-permeate side and a permeate side, and being more permeable to oxygen than nitrogen which, process entails feeding the feed stream side of the membrane and recovering an oxygen enriched gas being recovered on the permeate side of the membrane system while a nitrogen-enriched gas is recovered from the non-permeate side of the membrane wherein a feed back of nitrogen gas or nitrogen- containing gas having an oxygen gas concentration lower than 21% is supplied to the non-permeate side 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 August 25, 1993 and granted June 17, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.