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Expired Canadian patentCanada

Isobaric moving bed continuous gas purifier

CA 2188724 C · Owner: Heim, Carl Joseph · Inventors: Heim, Carl Joseph; Minbiole, Barry Alan; Carlins, James John

CIPO record

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

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Abstract From the Canadian patent

A method and system for separating one or more components from gas mixtures uses a moving bed of adsorption material particles under continuous and substantially isobaric pressure conditions. Contaminated gases are likewise purified by removing one or more contaminants therefrom using such a moving bed of adsorption material particles under continuous and substantially isobaric pressure conditions.

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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 October 24, 1996 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 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.
FiledOctober 24, 1996
GrantedSeptember 5, 2000
Term endedOctober 24, 2016
Patent numberCA 2188724 C
Classification (IPC)B01D53/08

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedOct 24, 1996Patent grantedSep 5, 2000Term endedOct 24, 2016

Sources & verification

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