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Expired Canadian patentCanada

Process for the preparation of fatty acid nitriles and glycerol from glycerides

CA 1305182 C · Owner: Stuhler, Herbert · Inventors: Fischer, Kurt; Stuhler, Herbert

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Abstract From the Canadian patent

Abstract of the disclosure Glycerides are reacted with ammonia in an amount of at least 200 liters per kilogram of glyceride per hour at, a temperature of 220 to 300°C, and in the presence of special catalysts. Of the product mixture which is formed and removed from the reaction with the excess ammonia and which is composed essentially of the components water the desired glycerol and fatty acid nitrile containing fatty acid and fatty acid amide, the latter component is returned to the reaction during the glyceride reaction. After completion of the glyceride reaction which is in-, dicated when the product mixture contains virtually no more glycerol, all the fatty acid nitrile containing …

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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 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 20, 1987
GrantedJuly 14, 1992
Term endedJuly 14, 2009
Patent numberCA 1305182 C
Classification (IPC)C07C31/22 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedNov 20, 1987Patent grantedJuly 14, 1992Term endedJuly 14, 2009

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