2,4- and 2,5-bistetrazolylpyridines, a process for the preparation thereof and the use thereof as pharmaceuticals
CA 2060622 A1 · Owner: Bickel, Martin · Inventors: Schubert, Gerrit; Gunzler-Pukall, Volkmar; Baader, Ekkehard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HOE 91/F 040, ABSTRACT OF THE DISCLOSURE 2,4- and 2,5-bistetrazolylpyridines, a process for the preparation thereof and the use thereof as pharmaceuticals, The invention relates to 2,4- and 2,5-bistetrazolylpyridines. Said compounds inhibit the enzymes proline hydroxylase and lysine hydroxylase and bring about a selective inhibition of collagen biosynthesis. They are used 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 February 4, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 4, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2014.
- 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.