Improvements relating to aqueous light duty cleaning compositions
CA 2270374 A1 · Owner: Unilever Plc · Inventors: Rennie, George Kerr; Yorke, John William Harold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Coalescence of oil droplets during the dishwashing process can be significantly retarded, without detriment to the spontaneous grease removal properties of the formulation, by the presence of selected polymers having a hydrophilic backbone and hydrophobic side chains. The present invention provides a non-lamellar, unbuilt, aqueous light duty cleaning composition , comprising: a) 2-70 wt.% of surfactant selected from the group comprising: nonionic surfactant, a complex of anionic surfactant and zwitterionic surfactant, a complex of anionic surfactant and amphoteric surfactant and mixtures thereof, and, b) 0.02-7 wt.% of a polymer said polymer comprising a , negatively charged or …
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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 November 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.