Tricyclic analgesics
CA 2376076 A1 · Owner: Roman, Francois J. · Inventors: Jacobelli, Henri; Hamon, Jacques; Grouhel, Agnes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tricyclic compound of Formula (I): wherein: R1 is hydrogen or hydroxy; R2 is hydrogen or hydroxy; or R1 and R2 together are oxygen; A is a bond CH2, CH , CH3, CH2 CH2 or C(CH3)2; R3 and R4 are the same or different and are hydrogen halo, C1-C6 alkyl, C1-C4 alkoxy, trifluoromethyl NO2, COR6, COOR6 or NR6R7, wherein R6 and R7 are the same or different and are hydrogen C1-C6 alkyl or , benzyl; R5 is hydrogen C1-6 alkyl, C2-6 alkenyl, C3-6 cycloalkyl (O=C)-C1-6 , alkyl, (O=C)-C2-6 alkenyl (O=C)-C3-6 cycloalkyl, wherein said alkyl alkenyl , and cycloalkyl groups can be substituted by 1 2 or 3 groups selected from , halo, C3-C6 cycloalkyl phenyl or substituted phenyl, and salts thereof are , …
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 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2022.
- 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.