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Expired Canadian patentCanada

Method for densely packing molecular sieve adsorbent beds in a psa system

CA 1321154 C · Owner: Kaplan, Robert H. · Inventors: Ringo, Steven M.; Shirley, Arthur I.; Kaplan, Robert H.

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Abstract From the Canadian patent

The improvement in the separation of gaseous mixtures by pressure swing adsorption (PSA) is disclosed. The interparticle voids in conventional PSA adsorbent beds are filled with fine particles. The ratio of the smallest dimension of the coarse adsorbent particles to the largest dimension of the fine particles, the size of the fine particles themselves and the percent of volume of the fine particles in the bed are all critical to optimum PSA performance. The fine particles may be comminuted adsorbent or an inert material, i.e. one having no adsorptive capacity.

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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 August 10, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 10, 2010.
  • 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 13, 1988
GrantedAugust 10, 1993
Term endedAugust 10, 2010
Patent numberCA 1321154 C
Classification (IPC)B01D53/04 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedOct 13, 1988Patent grantedAug 10, 1993Term endedAug 10, 2010

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