Softener composition
CA 2003324 A1 · Owner: Sotoya, Kohshiro · Inventors: Murata, Moriyasu; Okabe, Kazuhiko; Sotoya, Kohshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A softener composition comprising a quaternary ammonium salt having two hydrocarbon radicals having 12-22 carbon atoms and one unsaturated bond; the stereoisomeric structure of the above salt includes both the cis-isomer and the trans-isomer with the cis-isomer/trans-isomer ratio being in the range of from 25/75-90/10.
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 November 20, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2011.
- 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.