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Expired Canadian patentCanada

Optimal pressure swing adsorption refluxing

CA 2180994 C · Owner: Baksh, Mohamed Safdar Allie · Inventors: Notaro, Frank; Baksh, Mohamed Safdar Allie

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Segregated external gas storage tanks are used to store gases of varying purity for use in the purge and pressure equalization and product repressurization steps of pressure swing adsorption operations thereby, enabling the bed size factor and the power requirements of pressure swing adsorption-gas separation operations to be significantly reduced.

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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 July 11, 1996 and granted October 3, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 11, 1996
GrantedOctober 3, 2000
Term endedJuly 11, 2016
Patent numberCA 2180994 C
Classification (IPC)B01D53/05

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedJuly 11, 1996Patent grantedOct 3, 2000Term endedJuly 11, 2016

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.