Multilayer film and process for producing the same
CA 2365039 A1 · Owner: Toray Industries, Inc. · Inventors: Hatada, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayered film which is excellent in quality and processability and can be safely and stably produced. The film is characterized in that it comprises a substrate and, formed thereon, a polymer resin layer and a vapor-deposited film of a metal and/or a metal oxide and that at least 80 wt.% of the polymer resin layer is accounted for by a polymer of an unsaturated compound having at least two ethylene bonds and/or acetylene bonds per molecule and having neither an acrylic nor methacrylic group. The film having a vapor-deposited metal coating is usable as a packaging film having gas-barrier properties a , film for capacitors, etc.
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 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2021.
- 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.