Substituted indoloquinoxalines
CA 1303613 C · Owner: Akerfeldt, Stig Gustaf · Inventors: Bergman, Jan Olof Einar; Akerfeldt, Stig Gustaf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted indoloquinoxalines of the general formula I I, wherein R1 represents one or several preferably 1 to 4, similar or different substituents in the positions 1-4 and/or 7-10, selected from halogen, preferably Br lower alkyl/alkoxy, group having not more than 4 carbon atoms trifluoromethyl, group, trichloromethyl group; X is a group -(CH2)n-R2 wherein R2 represents a nitrogen containing basic residue such as NH2, NHR4 or NR5R6 wherein R4, R5 and R6 independently are lower alkyl or cycloalkyl and n is an integer of from 1 to 4 and, R3 represents hydrogen lower alkyl/cycloalkyl group having, not more than 4 carbon atoms and the physiologically acceptable addition products of the …
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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
- Granted June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 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.