Synthesis of amines and intermediates for the synthesis thereof
CA 2508290 C · Owner: Berens, Ulrich · Inventors: Dosenbach, Oliver; Sprenger, Daniel; Berens, Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates in a first embodiment to a method for the manufacture of esters of the formula (I), or especially of amides of the formula (II) wherein the symbols have the meanings given in the specification as well as , other intermediates and compounds useful in the synthesis of tryptamines and other substances mentioned in the title. The synthesis methods and intermediates are useful in the synthesis of pharmaceuticals.
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 December 12, 2003 and granted February 28, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2025.
- 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.