High-functionality highly branched or hyperbranched polycarbonates and their preparation and use
CA 2598033 C · Owner: Basf Aktiengesellschaft · Inventors: Schaefer, Harald; Bruchmann, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
High-functionality highly branched or hyperbranched polycarbonates based on dialkyl or diaryl carbonates or on phosgene diphosgene or triphosgene and , aliphatic aliphatic/aromatic and aromatic diols or polyols and also their use for preparing coating systems.
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 February 23, 2006 and granted August 12, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2026.
- 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.