Laundry detergent compositions
CA 2456101 A1 · Owner: Unilever Plc · Inventors: Gratton, Peter Leslie; Dixon, Sarah; Oakes, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A detergent composition which comprises: a surfactant a builder, a , fluorescer; one or more of a bleach precursor which is preferably N,N,N'N'tetra-acetyl ethylene diamine or sodium nonanoyloxy benzene sulphonate one or , more of a hydrogen peroxide source which is preferably an alkali metal perborate or percarbonate. Optionally it comprises a nitrogen-containing dye binding polymer selected from polymers and co-polymers of vinyl-pyrrolidone vinyl-pyridine N-oxide, and vinyl-imidazole and mixtures thereof. The , composition is essentially free of copper binding species other than those , which are deactivated by calcium salts.
Read the whole patent
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 July 30, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 30, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2024.
- 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
Timeline From CIPO dates
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.