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Expired Canadian patentCanada

Ethoxylated sulfonium switterionic compounds and detergent compositions containing them

CA 1083170 A · Owner: The Procter & Gamble Company · Inventors: Gosselink, Eugene P.; Richmond, James M.; Wentler, George E.

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Abstract From the Canadian patent

Compounds of the formula wherein R1 and R2 are each straight chain branched chain or, cyclic alkyl, alkenyl aryl, aralkyl or alkaryl moieties having from 1-30 carbon atoms, R3 is a C2-C8 alkylene alkenylene, arylene or alkarylene moiety; R4 is a C1-C8 alkylene. alkenylene arylene or alkarylene moiety: A is watersolubilizing anionic moiety: and n is from 1 to about 100 are useful as surfactants. Compounds wherein groups R1 R2, and R3 and integer n are selectively chosen provide good clay soil detergency performance even in the absence of boulders. The compounds are usefully combined With other organic surfactants to provide detergent compositions having good clay and oily soil removal …

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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.
FiledAugust 30, 1976
GrantedAugust 5, 1980
Term endedAugust 5, 1997
Patent numberCA 1083170 A
Classification (IPC)C11D1/60 +2 more

Timeline

Timeline From CIPO dates

1977198019831986198919921995Application filedAug 30, 1976Patent 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.