Process for the preparation of apovincaminic acid esters
CA 1258071 A · Owner: Richter Gedeon Vegyeszeti Gyar Rt · Inventors: Szantay, Csaba; Czibula, Laszlo; Kreidl, Janos
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 new process for the preparation of apovincaminic acid esters of the formula (I): (I), The invention further relates to novel active derivatives of the formulae (Ia) and (Ib):, (Ia), (Ib), Compounds of the formulae (I) (Ia) and (Ib) have pharmaceutical, uses for examples, as anti-inflammatory and anti-convulsive agents.
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
- Granted August 1, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 1, 2006.
- 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.