Novel pyridine-substituted pyrazolopyridine derivatives
CA 2429312 C · Owner: Lang, Dieter · Inventors: Dembowsky, Klaus; Wunder, Frank; Stasch, Johannes-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel pyrazolopyridine derivatives of the formula (I), wherein R1 represents 4-pyridinyl or 3-pyridinyl; R2 represents H NH2 or , halogen, and to the salts, isomers and hydrates thereof as stimulators of the soluble guanylate cyclase and for the use as agents for treating cardiovascular diseases, hypertonia, thromboembolic diseases and ischemias sexual dysfunction or inflammations and for treating diseases of the central nervous system.
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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 November 9, 2001 and granted January 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2023.
- 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
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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.