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Expired Canadian patentCanada

Surfactant mixtures, stable gas-in-liquid emulsions, and methods for the production of such emulsions from said mixtures

CA 1267055 C · Owner: D'Arrigo, Joseph S. · Inventors: D'Arrigo, Joseph S.

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Abstract From the Canadian patent

Surfactant mixtures for the production of stable gasin-liquid emulsions are provided comprising: a) a member selected from the group consisting of glycerol monoesters of saturated carboxylic acids containing from about 10 to about 18 carbon atoms and aliphatic alcohols containing from about 10 to about 18 carbon atoms;, b) a sterol aromatic acid ester; c) a member selected from the group consisting of sterols, terpenes, bile acids and alkali metal salts of bile acids;, d) a member selected from the group consisting of sterol esters of aliphatic acids containing from 1 to about 18 carbon atoms; sterol esters of sugar acids; esters of sugar acids and aliphatic alcohols containing from about …

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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 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 27, 1987
GrantedMarch 27, 1990
Term endedMarch 27, 2007
Patent numberCA 1267055 C
Classification (IPC)B01F17/44

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedMarch 27, 1987Patent grantedMarch 27, 1990Term endedMarch 27, 2007

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