Ruthenium metathesis catalysts
CA 2534324 C · Owner: Boehringer Ingelheim International Gmbh · Inventors: Arlt, Dieter
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 new compounds of formula 1 the preparation , thereof, intermediate products for preparing them and the use of the compounds of formula 1 as , catalysts in various metathesis reactions (see formula 1) , The new metathesis catalysts which are obtained from readily accessible preliminary , products, have a high activity and can be used for all kinds of metathesis reactions.
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 July 23, 2004 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2026.
- 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.