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Expired Canadian patentCanada

Selective-permeation gas-separation process and apparatus

CA 1266367 C · Owner: Trustees Of The Stevens Institute Of Technology (The) · Inventors: Sirkar, Kamalesh K.

CIPO record

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Abstract From the Canadian patent

Selective Permeation Gas-Separation Process and Apparatus, A permeant gas is selectively transferred from a fluid-gas mixture which comprises the permeant gas and at least one other component to an output fluid by the process of the invention. The process involves introducing a selective-permeation liquid into a permeation-transfer chamber. A gas-depletion channel and a gas-enrichment channel pass through the permeation chamber and are separated from the chamber respectively by porous walls. The selective-permeation liquid contacts the porous walls but does not flow into the gas-depletion or gas-enrichment channels. The feed-gas mixture is introduced into the gasdepletion channel so that …

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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 March 6, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 28, 1986
GrantedMarch 6, 1990
Term endedMarch 6, 2007
Patent numberCA 1266367 C
Classification (IPC)B01D53/14 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedMay 28, 1986Patent grantedMarch 6, 1990Term endedMarch 6, 2007

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