Label film for deep-drawing methods
CA 2835523 C · Owner: Treofan Germany Gmbh & Co. Kg · Inventors: Schmitz, Bertram; Kochem, Karl-Heinz; Tews, Wilfrid
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a biaxially oriented film having a microporous layer which contains a propylene polymer and at least one p-nucleating agent and whose microporosity is generated by converting .beta.-crystalline polypropylene into .alpha.-rystalline polypropylene during stretching of the film wherein the Gurley value of the microporous layer is in a range from 100,000 to 500,000 seconds or in a range of greater than 50 to 300,000 seconds. The film may be used for labelling containers in deep drawing.
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 October 5, 2005 and granted December 9, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.