Structured detergent pastes and a method for manufacturing detergent particles from such pastes
CA 2193650 C · Owner: Pluyter, Johan Gerwin L. · Inventors: Pluyter, Johan Gerwin L.; Aouad, Yousef Georges; Pangrle, Brian Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a structured paste which is substantially free of LAS and which is suitable for processing into a high bulk density high , active granular detergent. Surfactant pastes of the present invention have a viscosity of at least 10 Pa.s (measured at 70 ~C and 25 sec-1) and comprise: from 30 % to 90 % by weight of anionic surfactant; from 0 % to 50 % by weight of nonionic surfactant; from 0.5 % to 20 % by weight of either a polymeric cationic material or a polar amino acid; and from 1 % to 40 % by weight of water.
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 June 23, 1995 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 23, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2017.
- 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.