N,n'-bis(alkoxyalkyl)-pyridine-2,4-dicarboxylic acid diamides, preparation and their use
CA 2021529 C · Owner: Hoechst Aktiengesellschaft · Inventors: Bickel, Martin; Baader, Ekkehard; Gunzler-Pukall, Volkmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
N,N'-Bis(alkoxyalkyl)-pyridine-2,4-dicarboxylic acid diamides, preparation and their use, The invention relates to N,N'-bis(alkoxyalkyl)-pyridine- 2,4-dicarboxylic acid diamides of the formula I (I), wherein R1, R2, n, R1', R2' and n' have the meanings given. The compounds inhibit proline hydroxylase and lysine hydroxylase and are suitable as fibrosuppressants and immunosuppressants.
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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 19, 1990 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.