Carbon-containing material
CA 2407350 C · Owner: Evonik Degussa Gmbh · Inventors: Knackfuss, Bernd; Fanghanel, Egon; Luthge, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carbon-containing material with organic groups wherein this is obtainable by reaction of the carbon-containing material with organic compounds of the general formula 1 See formula (1) A process for preparing the carbon-containing material according to the invention is also described. The carbon-containing materials according to the invention can be used as fillers reinforcing fillers, UV stabilisers, conductivity carbon blacks or pigments.
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 7, 2002 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 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.