Light-excluding, multi-layered material
CA 2437922 C · Owner: Dimler, Steven R. · Inventors: Cook, David L.; Dimler, Steven R.; Gamel, Melissa J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-layered material for use in producing containers. The multi-layered material includes an inner layer, an outer layer and a regrind layer disposed , between the inner layer and the outer layer. The outer layer contains titanium dioxide and the regrind layer contains a dye selected from a group consisting of yellow dye and black dye.
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 23, 2002 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 23, 2024.
- 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.