Oriented multilayer heat sealable packaging film
CA 2028623 C · Owner: Touhsaent, Robert Edward · Inventors: Touhsaent, Robert Edward; Cretekos, George Foreman; Nahmias, Alan Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oriented heat sealable multilayer structure. The structure comprises a substrate having a first surface and a second surface, the substrate comprising a polyolefin film; a polymeric heat sealable layer on the first surface of the substrate, the layer comprising a polymeric material selected from the group consisting of a terpolymer of ethylene propylene, and butene-1, a random copolymer of ethylene and propylene and, blends thereof; a primer coating on the second surface of the substrate; and a water vapor and gas barrier layer on the primer coating, the water vapor and gas barrier layer selected from the group consisting of a vinylidene chloride copolymer containing at least about 50% …
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 26, 1990 and granted May 4, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2012.
- 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.