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Expired Canadian patentCanada

Stable pumpable synthetic detergent composition and process for the storage thereof

CA 2129131 C · Owner: Dunbar, James C. · Inventors: Beerse, Peter W.; Reed, Gary L.; Dunbar, James C.

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Abstract From the Canadian patent

Liquid compositions comprising acyloxy alkane sulfonic acid salt paraffin, water, optional salt reactant and optional fatty, acid are provided which have improved stability and pumpability. Also a method of preparing and a method of storing these compositions are provided utilizing temperature and particle size limitations. The composition method of making, and method, of storing the composition provide improved storage stability pumpability, and a decrease in processing time for the incorporation of the composition into finished bar formulations.

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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

  • Filed January 29, 1993 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 29, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 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.
FiledJanuary 29, 1993
GrantedAugust 11, 1998
Term endedJanuary 29, 2013
Patent numberCA 2129131 C
Classification (IPC)C11D1/12 +2 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedJan 29, 1993Patent grantedAug 11, 1998Term endedJan 29, 2013

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