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Expired Canadian patentCanada

Process for producing tert.butyl alkyl ethers in the presence of butadiene

CA 1205824 A · Owner: Snamprogetti S.P.A. · Inventors: Pescarollo, Ermanno; Ancillotti, Francesco

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Abstract From the Canadian patent

PROCESS FOR PRODUCING TERT.BUTYL ALKYL ETHERS IN THE PRESENCE OF BUTADIENE", ABSTRACT, In producing tert.butyl alkyl ethers starting from a hydrocarbon feedstock containing butadiene in addition to isobutene the, increase in the pressure drops through the etherification reactors due to the butadiene is eliminated by feeding the reactants from the bottom upwards.

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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
  • 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 16, 1983
GrantedJune 10, 1986
Term endedJune 10, 2003
Patent numberCA 1205824 A
Classification (IPC)C07C43/04 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedFeb 16, 1983Patent grantedJune 10, 1986Term endedJune 10, 2003

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