Water vapor permeable breathable films and their use
CA 2107599 A1 · Owner: Wolff Walsrode Ag · Inventors: Schultze, Dirk; Hargarter, Nicole; Funk, Hans-Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The invention relates to an extruded single-layer copolyetherester film with improved permeability to water vapor coupled with favorable mechanical properties, high elasticity and good surface slip so that it does not block on machinery.
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 October 4, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2015.
- 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.