Treatment of aqueous compositions containing contaminants
CA 2537603 C · Owner: Sutherland Separation Systems, Inc. · Inventors: Sutherland, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for a method of producing a composition containing a polymer having undergone phase inversion the method comprising , the step of: effecting phase inversion of a phase invertible water insoluble polymer in an aqueous composition and the composition comprises a mixture of at least two different substances, one of which is a water insoluble dispersible polymer having undergone phase inversion while the other is optionally a contaminant.
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 September 2, 2004 and granted June 25, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 2, 2026.
- 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.