Color-stable detergent tablets
CA 2298966 A1 · Owner: Holderbaum, Thomas · Inventors: Holderbaum, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The color stability of completely or partly colored detergent tablets containing builders, bleaching agents and other ingredients typical of detergents and at least one dye unstable to bleaching agents can be distinctly improved if the areas of the tablet where the dye unstable to bleaching agents is present additionally contains paraffin. This color-stabilizing effect is particularly pronounced in phosphate-free and citrate-containing tablets.
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 February 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2022.
- 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.