Bicomponent polymeric films containing block poly(ether-co-amides)
CA 2092670 A1 · Owner: Persinko, Mark M. · Inventors: Johnson, Bruce C.; Cashaw, Alan G.; Dabi, Shmuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A nonporous breathable polymeric film having first and second major layers of polymeric material. The first major layer contains a hydrophilic poly(ether-coamide)copolymer and a hydrophobic polymer. The second major layer contains one or more polymers thin films of, which meet specifically defined criteria for moisture vapor transmission rate, equilibrium water absorption and equilibrium 70% aqueous isopropanol absorption. The films find use as wound dressings, breathable backing materials or as structural components of such items as surgical gowns, patient drapes or hazardous material protection garments. CHIC-776
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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 March 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.