Expired Canadian patentCanada
Process and installation for cooling gas in a harmful gas processing installation
CA 2078027 C · Owner: L'Air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'Etude Et L'Exploitation Des Procedes Georges Claude · Inventors: Mazieres, Philippe; Chretien, Denis
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead 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 September 11, 1992 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 11, 1992
GrantedNovember 12, 2002
Term endedSeptember 11, 2012
Patent numberCA 2078027 C
Classification (IPC)F25J3/04 +1 more
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.