Block copolymers for improved viscosity stability in concentrated fabric softeners
CA 2201329 C · Owner: Procter & Gamble Company European Technical Center N.V. · Inventors: Eeckhout, Myriam Gerarda; Pluyter, Johan Gerwin Lodewijk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to fabric softening compositions to be used during the rinse cycle of a textile laundering operation to provide fabric softening/static control benefits. Said compositions comprise one or more polymers having a hydrophobic backbone with one or more hydrophilic side chains and are characterized by excellent storage stability and viscosity characteristics especially at elevated temperatures.
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 1, 1995 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2017.
- 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.