Laundry detergent compositions comprising hydrophobically modified vinyl pyrrolidone copolymers
CA 2503251 C · Owner: Soret, Catherine Marie-Joseph Simone · Inventors: Thomas, Robert Kemeys; Van Der Wal, Albert; Macnab, Donna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydrophobically modified vinyl pyrrolidone polymers which are copolymers having a vinyl pyrrolidone backbone and pendant hydrophobic side chains are useful in laundry detergent compositions to improve detergency and/or antiredeposition. The pendant hydrophobic side chains comprise alkyl chains containing from 4 to 20 carbon atoms and may be linked to the backbone via an ester linkage.
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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 12, 2003 and granted March 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2025.
- 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.