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Expired Canadian patentCanada

Liquid machine dishwashing composition

CA 1315640 C · Owner: Christiano, Steven P. · Inventors: Elliott, David L.; Sisco, Rosemary M.; Lang, David J.

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Abstract From the Canadian patent

C.6045 CA, ABSTRACT OF THE DISCLOSURE, A stable liquid automatic dishwashing composition as well as a process for its preparation is disclosed. The composition is an aqueous thixotropic fluid possessing a yield point. The composition may include swellable clays synthetic polymers, a specified amount of multivalent cations, builder salts, an alkaline source a hypochlorite, source, nonionic or anionic surfactants and defoamers. The system containing clay polymer, and multivalent, cations thickens the composition to provide structure to suspend finely divided solid components while maintaining, good salt tolerance and stability against hypochlorite.

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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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 9, 1988
GrantedApril 6, 1993
Term endedApril 6, 2010
Patent numberCA 1315640 C
Classification (IPC)C11D3/39 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJune 9, 1988Patent grantedApril 6, 1993Term endedApril 6, 2010

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