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Expired Canadian patentCanada

Etherification processing of light hydrocarbons

CA 1098547 A · Owner: Gulf Canada Limited · Inventors: Woods, Hanbury J.; Galvez, Buenaventura B.; Chase, John D.

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

Abstract, In the processing of olefinic hydrocarbon mixtures containing isobutylene and isoamylene which are etherified with methanol to obtain higher octane components unreacted methanol is removed from the etherified mixture by contact with a separate liquid glycol phase before unreacted hydrocarbons, substantially free of methanol are distilled from the etherified mixture for further catalytic processing in which methanol is deleterious to the catalyst.

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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 March 31, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1978
GrantedMarch 31, 1981
Term endedMarch 31, 1998
Patent numberCA 1098547 A
Classification (IPC)C07C7/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedSep 28, 1978Patent grantedMarch 31, 1981Term endedMarch 31, 1998

Sources & verification

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