Production of dobutamine compounds
CA 2120863 A1 · Owner: Van Der Meij, Paulus F. C. · Inventors: Van Der Meij, Paulus F. C.; De Jong, Paulus P. G.
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 process for the production of an acid addition salt of a dobutamine compound of the general formula (I), wherein R is a hydrogen atom or a methyl group and, n is 1 or 2, by reacting a mineral acid - addition salt of a dopamine compound of the general formula, (II), with a ketone of the general formula (III), under the influence of a catalytic amount of a base and in the presence, of hydrogen and a hydrogenation catalyst after which the pH of the reaction mixture is adjusted to approx. 6 at most and the product is isolated.
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 April 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2016.
- 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.