Centrally acting 6,7,8,9-tetrahydro-3h-benz(e)indole heterocyclics
CA 2073340 C · Owner: Lin, Chiu-Hong · Inventors: Haadsma, Susanne Renee; Andersson, Bengt Ronny; Carlsson, Per Arvid Emil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of formula (I) or pharmaceutically acceptable slats of formula (I) where R1 is H, C1-C3 alkyl, -(CH2)nCONH2 where n is 2 to 6 (CH2)n-1-(4,4-dimethylpiperidine-2,6-dione-yl) cyclopropylmethyl; R2 is hydrogen, C1-C8 alkyl C3-C8 cycloalkyl or combined with R1 to form a C3-C8 cycloalkyl C2-C8 alkenyl, C2-C8 alkynyl, (CH2)n-X-Ar where X is O, S, or NH, 3,3,3-trifluoropropyl-(CH2)m-R9 where m is 2 or 3 and R9 is phenyl 2-thiophenyl or 3-thiophenyl;, R3 is C1-C3 alky 2,2,2-trifluoroethyl, 3,3,3-trifluoropropyl formyl, CN, halogen, CH2OR2, C(O)C(O)Y where Y is OR1 or NR1R2, -(CH2)q-NR1R2 where q is 0 to 5 C=NOR2,2(4,5-dihydro)oxazolyl, or COR10 where R10 is H R1, NR1R2 or CF3;, R4 is …
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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 January 8, 1991 and granted May 20, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 8, 2013.
- 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.