Coated detergent tablet
CA 2273325 C · Owner: The Procter & Gamble Company · Inventors: Van Dijk, Paul Irma Albertus; Vega, Jose Luis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to tablets comprising a core and a coating the , core being formed by compressing a particulate material the particulate , material comprising surfactant and detergent builder and the coating , comprising a material or mixture of materials, which is substantially insoluble in water at 25 ~C. The invention also relates to processes for making the 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 November 19, 1997 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 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
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.