Composite material for light-, gas- and liquid-tight heat-sealing packagings
CA 2473117 A1 · Owner: Wolters, Michael · Inventors: Linden, Johannes; Trautwein, Werner; Wolters, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite material is disclosed, made from paper or cardboard as support material (1) with a plastic coating, in particular for lightgas- and liquid-, tight heat-sealing packagings whereby the plastic coatings each have external sealing layers (3) and a barrier layer (2) made from metal is arranged between the support material layer (1) and a sealing layer (3). The invention also relates to a method for production thereof. According to the invention the , support material layer (1) is protected in the composite material such that a packaging, made therefrom with the product therein may be sterilised in an , autoclave or similar and said composite material may be simply and …
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 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2025.
- 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.