Softening compositions and methods for making and using same
CA 2027644 C · Owner: Courard, Claude · Inventors: Lambremont, Yves; Contor, Laura; Courard, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Environmentally safe, stable, pourable aqueous fabric softening compositions based on the combination of a quaternary ammonium compound and an amido amine. The softener combination comprises from as little as 1% and up to 60% and preferably 2 to 20% by weight of the composition. Methods for making the composition are also described. Softening performance is outstanding and the compositions are simple to prepare even the, more highly concentrated forms. The softener compositions are primarily intended for use in the rinse cycle of an automatic washing machine.
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 October 15, 1990 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 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.