Heat-sealable multi-layer films of polyolefins
CA 1289448 C · Owner: Schinkel, Ingo · Inventors: Bohner, Jurgen; Schinkel, Ingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heat-sealable multi-layer films of polyolefine A b s t r a c t, Heat-sealable, at least monoaxially orientated multi-layer film of a base layer of a polypropylene and at least one heat-sealable layer of, 1. 35 to 70X by weight preferably 38 to 60X by weight, of olefin polymers of A) at least one terpolymer consisting of a) 65 to 82X by weight of propylene, b) 25 to 14% by weight of butene-1 c) 10 to 4X by weight of ethylene, and B) 0 to 7% by weight of a copolymer of ethylene and butene-1, wherein the sum of A) and B) or of a) to c) must always give 100% by weight and the monomer content of components A) and B) must always give 65 to 82% by weight of propylene, 25 to 14% by weight of …
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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
- Granted September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 2008.
- 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.