Expired Canadian patentCanada
High oxygen barrier coextruded film
CA 1296852 C · Owner: Cryovac, Inc. · Inventors: Schirmer, Henry George
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coextruded multilayer film includes a layer of a vinylidene chloride copolymer, and a layer of ethylene vinyl alcohol copolymer. The coextruded film has high oxygen barrier properties under both high and low humidity conditions. 404/850731/2/17
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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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 23, 1986
GrantedMarch 10, 1992
Term endedMarch 10, 2009
Patent numberCA 1296852 C
Classification (IPC)B32B27/28 +1 more
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.