Label film with improved adhesion
CA 2436695 C · Owner: Holzer, Susanne · Inventors: Wieners, Gerhard; Holzer, Susanne; Lauer, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of a biaxially oriented polyolefin film as a label film. The inventive film consists of a base layer and at least one cover layer. Said cover layer contains as the main component a copolymer or terpolymer consisting of one alkene and unsaturated carboxylic acids or the esters thereof and low amounts of an additive. The cover layer is characterized by excellent and diverse adhesion to various polymer materials from which containers are formed. It is no longer necessary to apply adhesives, primers, coatings etc. in a separate step after production of the film.
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 5, 2001 and granted February 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2023.
- 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.