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Expired Canadian patentCanada

Process for separating normal paraffins

CA 1190482 A · Owner: Uop Inc. · Inventors: Kulprathipanja, Santi; Neuzil, Richard W.

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Abstract From the Canadian patent

PROCESS FOR SEPARATING NORMAL PARAFFINS" ABSTRACT, A process for separating a normal paraffin from a mixture of the same with another structural class of hydrocarbon selected from the cyclic hydrocarbons having greater than six carbons per molecule and the branched chain hydrocarbons. The process comprises contacting the mixture at adsorption conditions with an adsorbent comprising silicalite. The normal paraffin is selectively adsorbed and will preferably be recovered from the adsorbent by desorption with a desorbent material.

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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 July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 16, 1982
GrantedJuly 16, 1985
Term endedJuly 16, 2002
Patent numberCA 1190482 A
Classification (IPC)C07C7/13 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJuly 16, 1982Patent grantedJuly 16, 1985Term endedJuly 16, 2002

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