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Expired Canadian patentCanada

Process for preparation of catalysts for oxyalkylation of reactive hydrogen compounds

CA 1187105 A · Owner: Union Carbide Corporation · Inventors: Mccain, James H. Jr.; Foster, Donald J.

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Abstract From the Canadian patent

A process is provided for the preparation of soluble basic salts of alkaline earth metals that are catalytically active in the oxyalkylation reaction of alcohols, polyols and phenols which comprises reacting an alkaline earth metal material selected from the group consisting of calcium strontium, and barium and mixtures of the same with a lower monohydric alcohol having 1 to 7 carbon atoms at a temperature at which the reaction proceeds to form a lower alcohol metal alkoxide, mixing a polyol or a higher monohydric alcohol having at least 4 carbon atoms with the lower alcohol-alkaline earth metal alkoxide reaction product and removing the lower alcohol therefrom. S P E C I F I C A T I O N 1.

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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 May 14, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 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.
FiledAugust 27, 1980
GrantedMay 14, 1985
Term endedMay 14, 2002
Patent numberCA 1187105 A
Classification (IPC)C07C31/30 +2 more

Timeline

Timeline From CIPO dates

19811984198719901993199619992002Application filedAug 27, 1980Patent grantedMay 14, 1985Term endedMay 14, 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.