Ethylene propylene terpolymer film
CA 2038800 A1 · Owner: Shah, Gautam P. · Inventors: Shah, Gautam P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymeric film is provided which comprises a core layer of ethylene vinyl alcohol copolymer, and two outer layers of ethylene propylene terpolymer. The outer layers are preferably blended with polypropylene. A preferred embodiment of the multilayer film if, coextruded, also includes intermediate adhesive layers. This film exhibits excellent optical properties and shrink properties while providing high oxygen barrier especially useful in food packaging applications.
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 March 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2013.
- 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.