Indole derivatives
CA 2178161 C · Owner: Pfizer Inc. · Inventors: Wythes, Martin James; Macor, John Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula , I wherein n is 0 1, or 2; X is chlorine, bromine, or iodine; R1 is hydrogen; R2 is selected from hydrogen halogen, cyano, -OR4 -(CH2)m-(C=O)NR5R6 -(CH2)m-SO2NR5R6, -(CH2)m-NR7(C=O)R8 --(CH2)m-NR7SO2R8 -(CH2) m-S(O)xR8, -(CH2)m-NR,(C=O)NR5R6 -(CH2)m-NR,(C=O)OR9, and -CH=CH(CH2)yR10; R3 is C1 to C6 linear or branched alkyl and the pharmaceutically acceptable salts thereof are new. These compounds are useful psychotherapeutics and are potent serotonin (5-HT1) agonists and may be used in the treatment of depression anxiety, eating disorders, obesity, drug abuse cluster headache, migraine, pain, chronic paroxysmal hemicrania and headache associated with vascular …
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 June 4, 1996 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2018.
- 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.