New amino acid derivatives, processes for the manufacture thereof and pharmaceutical compositions containing these compounds
CA 2120956 A1 · Owner: Boehringer Ingelheim International Gmbh · Inventors: Jung, Birgit; Burger, Erich; Esser, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, The invention relates to new amino acid derivatives of general formula I, (I), and the pharmaceutically acceptable salts thereof wherein group B is - A2 - NR2R3 or R5, wherein group R5 is , or , II III IV, and R1, A1, A2, R2, R3 R6, R7, R8, R9, X, Y, Z, t and u, have the meanings described in the specification as, well as the preparation and use thereof. The novel compounds are valuable neurokinin (tachykinin) antagonists.
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 August 28, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2015.
- 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.