Indole derivatives
CA 1310968 C · Owner: Glaxo Group Limited · Inventors: Oxford, Alexander William; Butina, Darko; Owen, Martin Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds are disclosed of formula (I) (I), wherein, R1 represents H or C1-6 alkyl; R2 represents H or C1-6 alkyl;, R3 represents H; R4 represents H or C1-3 alkyl;, and pharmaceutically acceptable salts and solvates (for example hydrates) thereof. The compounds are indicated as useful for the treatment of migraine, cluster headache, chronic paroxysmal hemicrania and headache associated with vascular disorders. Processes and intermediates for their preparation and pharmaceutical compositions containing them are also disclosed.
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
- Granted December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
- 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.