Spect imaging agents for serotonin transporters
CA 2372481 A1 · Owner: Kung, Hank F. · Inventors: Kung, Hank F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to compounds of Formula (1) or pharmaceutically acceptable salts thereof; wherein X is hydrogen C1, Br, I, NO2, NR3R4 or -L-Ch; Y is hydrogen -CH2OR5, -CH2NCH3R1, NO2, NR3R4 or-, L-Ch; Y' is hydrogen -CH2OR5, -CH2NCH3R1, NO2, NR3R4 OR -L-CH; provided that at least one of the Y or Y' is -CH2NCH3R1; Z is S, O, NR6, CR7R8, C(O) or -C(=CR7R8)-; A is hydrogen, C1, I, Br or -L-Ch; R1 is hydrogen C1-C5 alkyl, C3-C8 , cycloalkyl C1-5 alkylcarbonyl (C3-C8 cycloalkyl) carbonyl, pnenyl, benzyl naphthyl, naphthlymethyl or L-Ch; R2 is hydrogen or methyl; and R3-R8 are as defined herein. Radiolabeled compounds of the invention are useful as selective serotonin …
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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 April 30, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2021.
- 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.