Laminated material with good gas barrier properties, and a method for the manufacture of the material
CA 2007481 C · Owner: Tetra Alfa Holdings S.A. · Inventors: Frisk, Peter; Lofgren, Lars
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminated material for the manufacture of packing containers with good gas barrier properties or parts for such containers. The material comprises a barrier layer consisting of a mixture of amorphous polyamide and ethylenevinyl alcohol copolymer serving as a gas barrier.
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 January 10, 1990 and granted January 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 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.