Thienylpiperazines, process for the preparation thereof, the use thereof, and pharmaceuticals containing these and the preparation thereof
CA 2012661 C · Owner: Cassella Aktiengesellschaft · Inventors: Schindler, Ursula; Beyerle, Rudi; Jablonka, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to thienylpiperazines of the general formula I, (see formula I) in which R1 denotes hydrogen or double-bonded oxygen and R2 denotes hydrogen or double-bonded oxygen with R1 and R2 not both, having the same meaning as well as the pharmaceutically tolerated salts thereof, process for the preparation thereof the use, thereof, and pharmaceuticals containing these and the preparation thereof.
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 March 21, 1990 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2012.
- 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.