Enzyme-containing detergent compositions
CA 2002440 A1 · Owner: Unilever Plc · Inventors: Armstrong, Graeme D.; Adams, Christopher J.; Hight, Andrew T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A granular detergent composition or component therefor which comprises:, (a) from 6% to 35%, often over 17% by weight, of non-soap detergent-active material consisting at least partially of anionic and/or nonionic detergent-active material;, (b) at least 45% by weight of builder (b1) the builder including at least 28% e.g. up, to 45%, by weight (anhydrous basis) of crystalline or amorphous sodium aluminosilicate and/or citrate carbonate, or layered silicate builder (c) a lipolytic enzyme, the weight ratio of (b1) to (a) being from 0.9:1 to 2.6:1 preferably from 1.2:1 to 1.8:1; and other detergent ingredients to 100% by weight.
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 November 7, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2011.
- 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.