Thermoplastic polymer film comprising a fluorochemical compound
CA 2310689 A1 · Owner: Spielmann, Rolf · Inventors: Goeman, Bart; Spielmann, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method of making a film comprising the steps of: (A) providing a film comprising a layer of thermoplastic polymer having dispersed therein a fluorochemical hydrophilicity imparting compound according to the formula: Rf-Q-Z-X-T, wherein Rf represents a partially or fully fluorinated aliphatic group having at least 3 carbon atoms Q is a linking group or a , covalent bond Z is a poly(oxyalkylene) group, X is an oxygen atom or NR wherein R is a hydrogen atom or an alkyl or aryl group and T is a hydrogen , atom or an organic group having no more than 6 carbon atoms; (B) applying a coating comprising at least one non-volatile component on said film; and (C) when …
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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 November 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2020.
- 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
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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.