Particulate detergent compositions
CA 2108906 C · Owner: Wilkinson, Carole P. D. · Inventors: Wilkinson, Carole P. D.; Moss, Michael A. J.; Baillely, Gerard M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Particulate compositions are provided incorporating from about 10 % to about 95 % by weight of a crystalline layered silicate material of the formula Na MSixO2x + 1 yH2O where M is sodium or hydrogen, x is a number from about 1.9 to 4 and y is a number from 0 to about 20 and from about 5 % to about 90 % by weight of a solid water soluble ionisable material selected from organic acids, organic and inorganic acid salts and mixture thereof said solid water soluble ionisable material naming a mean particle size not greater than about 100 micrometers said particulate compositions being substantially free of unbound moisture. The particulates can optionally contain up to about 50 % by weight of a …
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 April 21, 1992 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2014.
- 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.