Fabric softening composition
CA 2020948 A1 · Owner: Unilever Plc · Inventors: Turner, Graham Andrew; Foster, Francis Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fabric softening composition is provided which comprises:, (i) an amphoteric fabric softening material; (ii) a nonionic cellulose ether having a gel point of less than 58°C, an HLB of between 3.1 and 4.3 said cellulose ether being substituted with C1-3 alkyl and/or hydroxyalkyl groups;, said composition preferably having a pH of between 1.5 and 6.0 at a concentration of 1 g/l of amphoteric softening material in water at 25°C.
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 July 11, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.