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Expired Canadian patentCanada

Process for the regeneration of a solid bed metal phthalocyanine catalyst system

CA 1072526 A · Owner: Uop Inc. · Inventors: Hilfman, Lee

CIPO record

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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 is disclosed for the regeneration of a solid metal phthalocyanine catalyst bed system which comprises a methal phthalocyanine impregnated on a charcoal support said, regeneration comprising (a) washing said charcoal support with water at a temperature of about 200°F. to about 350°F. to extract excess caustic and hydrocarbonaceous materials (b) treat-, ing the washed charcoal support with steam at a temperature of about 650°F. to about 1000°F. and (c) reimpregnating the treated charcoal support with from about 0.001 wt. % to about 10.0 wt. % of a metal phthalocyanine compound. The process of this invention is directed to regeneration of a metal phthalocyanine impregnated charcoal …

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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 February 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 26, 1980
Term endedFebruary 26, 1997
Patent numberCA 1072526 A
Classification (IPC)B01J31/40 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 26, 1980Term endedFeb 26, 1997

Sources & verification

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