Fabric softening composition
CA 2112816 C · Owner: Turner, Graham Andrew · Inventors: Turner, Graham Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fabric softening material comprising an ester-linked amine compound and/or its corresponding quaternary ammonium compound of general formula (I) where each R1 group is independently selected from C1-4 alkyl alkenyl, or hydroxyalkyl, groups; each R2 group is independently selected from C8-28 or alkenyl groups and n and m are integers from 1 to 5; such that the material has an Iodine value of between 5 and 24 preferably between 5 and 20. The invention also comprises an aqueous fabric softening composition containing the softening material.
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 June 30, 1992 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2014.
- 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.