Multilayered coating systems containing a gel-like base layer and a polyurethane topcoat, and their production and use
CA 2417425 C · Owner: Bayer Aktiengesellschaft · Inventors: Kuttner, Wolfram; Stender, Adolf; Kobusch, Claus
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 multi-layered coating consisting of a) a base coat , of a high-molecular gel-type polyurethane and b) a top coat consisting of polyurethane lacquer. The invention also relates to the production and use (application) thereof.
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 July 23, 2001 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 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.