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Expired Canadian patentCanada

Mixing assembly for gaseous flows at different temperatures, in particular for heterogeneous exothermic synthesis reactors

CA 2181785 C · Owner: Methanol Casale S.A. · Inventors: Zardi, Umberto; Pagani, Giorgio

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Abstract From the Canadian patent

A mixing assembly for gaseous flows at different temperatures, in particular for heterogeneous exothermic synthesis reactors comprising an air space (11) for collection of a hot gas flow (A) an, annular opening (12) for outlet of the hot gas flow (A) from the air space (11) and a perforated distributor (13) for a cooling gas flow (B) arranged below the air space (11), calls for a constant thickness of the air space (11) in correspondence of the annular opening (12) and a ratio between 0.2 and 1 of the width of the annular opening (12) to the thickness of the air space (11). The present mixing assembly allows compensation for local variations in the flow rate of the hot gas flow (A) leaving …

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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 February 25, 1995 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2017.
  • 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 25, 1995
GrantedAugust 19, 2003
Term endedFebruary 25, 2015
Patent numberCA 2181785 C
Classification (IPC)B01J8/04 +1 more

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedFeb 25, 1995Patent grantedAug 19, 2003Term endedFeb 25, 2015

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