6-oxygenated-1,3,4,5-tetrahydrobenz(cd)indol-4-amines
CA 1266675 C · Owner: Kruse, Lawrence I. · Inventors: Kaiser, Carl; Kruse, Lawrence I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
6-Oxygenated-1,3,4,5-tetrahydrobenzcdindol-4-amines having the following structure, wherein R1 is hydrogen or C1-5alkyl and R2 and R3 are, the same or different and are hydrogen C1-4alkyl, phenyl(CH2)n where n is 0 to 3 C5-6cycloalkyl, or C3-5, alkenyl are prepared by reductive amination of the corresponding indol-4-ones, or by hydrogenation of 4-nitro-1,3,4,5-tetrahydrobenzcdindoles. These compounds are active as serotonin antagonists.
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 March 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2007.
- 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.