Fabric softening composition
CA 2011125 C · Owner: Butterworth, Robert Michael · Inventors: Butterworth, Robert Michael; Saunders, Kenwyn, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous fabric conditioning composition comprising a fabric softener and a polymeric thickening material, said material comprising molecules with a hydrophilic backbone and at least two hydrophobic groups per molecule attached to the hydrophilic backbone with, the proviso that the polymeric material is not a hydrophobically modified nonionic cellulose ether.
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 28, 1990 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.