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Expired Canadian patentCanada

Molecular sieve type gas separation systems

CA 1248880 A · Owner: Normalair-Garrett (Holdings) Limited · Inventors: Taylor, James C.; Hamlin, Humphrey A.S.

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Abstract From the Canadian patent

Title: Molecular Sieve Type Gas Separation Systems The sieve beds of a molecular sieve type gas separation system are cyclically subjected to a charge/adsorption on-stream phase followed by a purge/desorption regeneration phase and each bed is arranged to be open to ambient atmospheric pressure or a pressure related thereto during the regeneration phase. A fixed logic sequencer unit provides two different overall cycle times and fixes the relative durations of each phase within the overall cycle times. A switching device, which preferably includes a flueric partial pressure sensor (Figure 2), responds to the pertaining concentration of a constituent gas in the product gas delivered by the …

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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

  • Granted January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 30, 1984
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1248880 A
Classification (IPC)B01D53/04 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedMarch 30, 1984Patent grantedJan 17, 1989Term endedJan 17, 2006

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