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Expired Canadian patentCanada

Machine dishwashing compositions

CA 1306166 C · Owner: Unilever Plc · Inventors: Kreischer, Pieter H.

CIPO record

Overview

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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 thixotropic liquid machine dishwashing composition is provided structured essentially by a surfactant system comprising a non-soap anionic active and soap where the, total electrolyte level in the composition is greater than 20% by weight and the anionic and soap are present in relative amounts of from 4:1 to 1:4.

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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
  • 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 18, 1988
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306166 C
Classification (IPC)C11D3/39 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 18, 1988Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

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