Fabric softening compositions containing mixtures of softener material and highly ethoxylated curd dispersant
CA 2131306 C · Owner: The Procter & Gamble Company · Inventors: Severns, John Cort; Vogel, Alice Marie; Wahl, Errol Hoffman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rinse-added fabric softening compositions are provided comprising mixtures of a diester quaternary ammonium fabric softener material, a highly ethoxylated hydrophobic material as a scum dispersant and a liquid carrier. This mixture prevents the formation of scum caused by the interaction of the diester quaternary ammonium fabric softener material with anionic detergent surfactant and/or detergency builder entrapped in the fabric. These preferably biodegradable, compositions have good product stability, dispersibility, and concentratability as well as excellent fabric softening characteristics.
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 February 25, 1993 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2015.
- 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.