Detergent composition
CA 2046483 C · Owner: Robb, Derek John Macdonald · Inventors: Osler, Jonathon; Fry, Alan John; Robb, Derek John Macdonald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tablet of compacted detergent powder comprises an anionic detergent-active compound, a detergency builder and optionally other detergent ingredients. The tablet is the compaction product of a particulate mixture of: (a) from 2 to 40 wt% of a first particulate component comprising from 20 to 100 wt% of component (a) of anionic detergent-active compound, (b) from 60 to 98 wt % of other ingredients comprising, from 0 to 3 wt% of component (b) of anionic detergent-active compound.
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 8, 1991 and granted February 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2013.
- 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.