Destructible fluorinated alkoxysilane surfactants and repellent coatings derived therefrom
CA 2113759 A1 · Owner: Pellerite, Mark James · Inventors: Jones, Richard Roy Marriott; Pellerite, Mark James
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides liquid destructible fluorinated nonionic surfactants that are water-soluble or dispersible, that are useful as stabilizers for emulsions, and that on curing as a layer on a substrate can provide the substrate with an oiland water-repellent coating that is free of surfactant, the destructible surfactant comprising a fluorocarbylalkoxysilane having at least one polyfluorinated aliphatic group that is both hydrophobic and oleophobic and at least one preferably, two, polyoxyalkylene or other hydrophilic groups which can be cleaved from the hydrophobe by hydrolysis. More particularly, a fluorocarbylalkoxysilane comprises at least one polyfluorinated aliphatic group …
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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 January 19, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2016.
- 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.