Fluorochemical urethane composition for treatment of fibrous substrates
CA 2514451 A1 · Owner: 3M Innovative Properties Company · Inventors: Johnson, Mitchell T.; Lien, Larry A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The compositions comprise one or more fluorochemical urethane compounds and one or more silsesquioxane compounds. This fluorochemical urethane compound(s) comprises the reaction product of (a) one or more polyfunctional isocyanate compounds; (b) one or more fluorochemical monofunctional compounds; and optionally (c) one or more hydrophilic polyoxyalkylene compounds; and/or (d) one or more silane compounds.
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 December 23, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2025.
- 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.