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Expired Canadian patentCanada

Method of boosting foam in low sudsing detergents

CA 1331121 C · Owner: Lo, Sunny J. · Inventors: Lo, Sunny J.; Snow, Steven A.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method of boosting foam in a low sudsing detergent system containing high levels of cationic or nonionic fabric softening surfactants in a textile wash liquor wherein there is added to the wash liquor in addition to the detergent a foam boosting effective amount of a short chain non-toxic organosulfobetaine zwitterionic siloxane based silicone surfactant compound and causing the detergent and the silicone compound to be homogeneously intermixed in the wash liquor along with the textiles.

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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 2, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 2, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 14, 1989
GrantedAugust 2, 1994
Term endedAugust 2, 2011
Patent numberCA 1331121 C
Classification (IPC)C11D1/94 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJuly 14, 1989Patent grantedAug 2, 1994Term endedAug 2, 2011

Sources & verification

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