Biodegradable multi-layer film
CA 2543306 C · Owner: Greenlemons Consulting Ltd. · Inventors: Berger, Werner; De Jong, Frits Pieter Eduard Anton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a biodegradable multi-layer film which has a regulatable barrier , effect against oxygen nitrogen, carbon dioxide and steam and is used in the field of , packaging, especially for food or in agriculture. The invention also relates to a method , for producing said film. The inventive multi-layer film can be produced by coextrusion , and is formed by at least one starch blend layer consisting of a modified thermoplastic , starch blend containing between 1 % and 10 % of water and a polyester layer , consisting , of a biodegradable polyester.
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 December 9, 2003 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 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.