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Expired Canadian patentCanada

Dust pre-removal method in a dry moving bed type adsorption tower

CA 1260406 A · Owner: Electric Power Development Company, Limited · Inventors: Furuyama, Kuninori; Ito, Yoshiro

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Abstract From the Canadian patent

A dust pre-removal method in a dry moving bed type adsorption tower, ABSTRACT OF THE DISCLOSURE In a dry moving bed type adsorption tower using a granular adsorbent, for example, for removing SOx and NOx from waste gases, the granular adsorbent entering the adsorption tower is previously rinsed with a gas in a feed pipe of the adsorbent, whereby to omit the installation of a dust collector at the outlet of the adsorption tower.

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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 September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 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.
FiledFebruary 15, 1985
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1260406 A
Classification (IPC)B01D53/06 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedFeb 15, 1985Patent grantedSep 26, 1989Term endedSep 26, 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.