Benzazepine derivatives
CA 1202970 A · Owner: Hoffmann-La Roche Limited · Inventors: Walser, Armin; Fryer, Rodney I.; Trybulski, Eugene J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula, I, wherein R1 and R3 are hydrogen lower alkyl, hydroxy, lower alkoxy or acyloxy and R2 and R4 are hydrogen or R1 and R2 and/or R3 and R4 taken together are oxo groups with the proviso that at least one oxo group is present; R is hydrogen, lower alkyl C2 to C7, carboxylic acids and the esters and amides thereof hydroxy C2 to C7 alkyl, amino C2 to C7 alkyl or mono- or di-lower alkyl amino C2 to C7 alkyl; R5 is halogen having an atomic number not greater than 35 or hydrogen; and R6 is halogen having an atomic number not greater than 35 with the proviso that when R1 or R3 is hydroxy, lower alkoxy or acyloxy then R, is lower alkyl or hydrogen, and the N-oxides and the …
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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
- Granted April 8, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 2003.
- 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.