Hydrogenation of an anthraquinone compound in the presence of a catalyst comprising, as active metal, at least one metal of transition group viii of the periodic table of the elements
CA 2308459 A1 · Owner: Henkelmann, Jochem · Inventors: Bottcher, Arnd; Brocker, Franz Josef; Henkelmann, Jochem
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 method for hydrogenating an anthraquinone compound or a mixture containing two or more anthraquinone compounds using special catalysts, which comprise a metal of the eight subgroup of the periodic table as an active metal.
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 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2020.
- 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.