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Expired Canadian patentCanada

Process for enriched combustion using solid electrolyte ionic conductor systems

CA 2239677 C · Owner: Keskar, Nitin Ramesh · Inventors: Kobayashi, Hisashi; Prasad, Ravi; Drnevich, Raymond Francis

CIPO record

Overview

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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 process for separating a feed gas stream into an oxygen-enriched gas stream which is used in a combustor and an oxygen-depleted gas stream. The feed gas stream is compressed, and oxygen is separated from the compressed feed gas stream using an ion transport module including an ion transport membrane having a retentate side and a permeate side. The permeate side of the ion transport membrane is purged with at least a portion of a combustion product gas stream obtained from the combustion in the combustor of the gas stream exiting the permeate side of the ion transport module.

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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 June 4, 1998 and granted February 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 4, 1998
GrantedFebruary 12, 2002
Term endedJune 4, 2018
Patent numberCA 2239677 C
Classification (IPC)B01D53/22 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedJune 4, 1998Patent grantedFeb 12, 2002Term endedJune 4, 2018

Sources & verification

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