Derivatives of pyrimido¬6,1-a isoquinolin-4-one
CA 2368460 A1 · Owner: Oxford, Alexander William · Inventors: Jack, David; Oxford, Alexander William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of general formula (I) wherein each of R1 and R2 independently represents a C1-6 alkyl or C2-7 acyl group; X represents OCH2 or a group CR3R4, wherein each of R3 or R4 independently represents a hydrogen atom or a C1-3 alkyl group; R5 represents a hydrogen atom or a C1-3 alkyl C2-3 alkenyl , or C2-3 alkynyl group; R6 represents a hydrogen atom or a C1-6 alkyl C2-6 , alkenyl, C2-6 alkynyl, amino, C1-6 alkylamino di(C1-6) alkylamino or C2-7 , acylamino group; each of R7 and R8 independently represents a hydrogen or halogen atom or a hydroxy, trifluoromethyl C1-6 alkyl, C2-6 alkenyl, C2-6 , alkynyl C2-7 acyl, C1-6 alkylthio, C1-6 alkoxy C3-6 cycloalkyl; R9 , represents a hydrogen …
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 March 29, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 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.