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Expired Canadian patentCanada

Aqueous antioxidant emulsions

CA 1339918 C · Owner: Mollet, Hans · Inventors: Holer, Martin; Mollet, Hans

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Abstract From the Canadian patent

Storage-stable, non-sedimenting emulsions comprising a) 10 to 80 % by weight, based on the emulsion, of one or more antioxidants, b) 0.25 to 10 % by weight based on the, emulsion, of a surfactant in the form of a fatty acid salt of formula R-COOY, wherein R is straight chain or branched C3-C18alkyl or straight chain or branched C3-C18alkenyl or is, phenyl(C3-C18)alkyl, and Y is an alkali metal which salt is, prepared in situ from the fatty acid c) 0.25 to 10 % by, weight, based on the emulsion of a co-surfactant in the form, of an alcohol of the general formula R'-OH wherein R' is, straight chain or branched C4-C19alkyl or straight chain or branched C4-C19alkenyl, or is phenyl(C4-C19)alkyl …

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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 June 23, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 2015.
  • 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 14, 1989
GrantedJune 23, 1998
Term endedJune 23, 2015
Patent numberCA 1339918 C
Classification (IPC)C09K15/06 +1 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedAug 14, 1989Patent grantedJune 23, 1998Term endedJune 23, 2015

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