Cycloalkyl derivatives and the solid-phase synthesis of such derivatives
CA 2248600 A1 · Owner: Basf Aktiengesellschaft · Inventors: Steinmetz, Adrian; Tietze, Lutz F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns cycloalkyl derivatives of formula (I) where n is 0 to , 4 and the other variables have the meaning given in claim 1. It also concerns a method for producing said derivatives and their use for producing compounds of formula (VI), where X means -COOR4, -CONR5R6 CH2OH.
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 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2019.
- 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.