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Expired Canadian patentCanada

Anionic complexes of quaternary ammonium salts

CA 1083153 A · Owner: The Kendall Company · Inventors: Samour, Carlos M.

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Abstract From the Canadian patent

Anionic complexes of quaternary ammonium salts having an ethylenically-unsaturated radical and a lipophilic radical covalently linked to the quaternary nitrogen atom are disclosed. Examples of such complexes are allyl hexadecyl dimethyl ammonium dodecyl sulfonate allyl, hexadecyl dimethyl ammonium dodecyl benzene sulfonate and allyl dimethyl, dodecenyl hydroxysuccinyloxy ethyl ammonium dodecyl benzene sulfonate. These anionic complexes are useful as monomeric emulsion stabilizers.

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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 August 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 5, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 29, 1971
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083153 A
Classification (IPC)C08K5/19 +2 more

Timeline

Timeline From CIPO dates

197219751978198119841987199019931996Application filedApril 29, 1971Patent grantedAug 5, 1980Term endedAug 5, 1997

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