Rinse-added fabric conditioning compositions containing fabric softening agents and cationic polyester soil release polymers
CA 2016423 C · Owner: Trinh, Toan · Inventors: Trinh, Toan; Gosselink, Eugene Paul; Hardy, Frederick Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rinse-added fabric conditioning compositions containing cationic soil release polymers are much more effective than similar compositions containing nonionic soil release polymers for soil release. Most of the cationic soil release polymers are new compounds comprising a hydrophobic alkylene oxide/terephthalate portion which has a low molecular weight and at least a single cationic charge under use conditions.
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 May 9, 1990 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 9, 2012.
- 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.