(?)-4-hydroxy-1,2,9,10-tetraalkoxy-aporphine derivatives
CA 1077042 A · Owner: Warner-Lambert Company · Inventors: Hartenstein, Johannes; Satzinger, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The new 4-hydroxy-aporphine derivatives according to the present invention are compounds of the general formula: (I), wherein R1, R2, R3 and R4, which may be the same or different are methyl or ethyl radicals, R5 is a hydrogen atom or a straight-chained, cyclic or branched alkyl radical containing up to 5 carbon atoms and the symbol X or Y in the trans- position to the 6a hydrogen atom represents a hydroxyl group while the remaining X or Y symbol represents a hydrogen atom with, the proviso that when R5 is a methyl radical then at least, one of the substituents R1 R2, R3 or R4 is an ethyl radical. These products useful on the cardiovascular system.
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
- Granted May 6, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 1997.
- 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.