Liquid composition
CA 2074751 A1 · Owner: Shell Canada Limited · Inventors: Beers, Nicolaas C. M.; Muijs, Herman M.; Wiersma, Rendert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a liquid composition in the form of a solution comprising, a) an alkylated xylenesulphonic acid salt; b) a glycol having a molecular weight of between 200 and 1500; c) an aromatic, paraffinic or naphthenic oil; and d) less than 1 percent by weight of water calculated on the total, composition. C15/T1509FF
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 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 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.