Derivatives of dihydroindenothiadiazinone
CA 1251205 A · Owner: Smith Kline & French Laboratories Limited · Inventors: Coates, William 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) :- (I), and salts thereof, wherein R1 is hydrogen C1-6alkyl, halo, cyano, nitro, amino, a group -NHCOR4 a group, -COR5, or a group -NHC(NCN)NHR6; wherein R4 is hydrogen, C1-6alkoxy, C1-6alkyl optionally substituted by phenyl, or R4 is a group NR7R8 wherein R7 and R8 are independently hydrogen, C1-6alkyl or benzyl; R5 is hydroxy, hydrogen, C1-6alkyl, C1-6alkoxy or a, group -NR7R8; and R6 is hydrogen or C1-6alkyl; R2 is hydrogen or C1-4alkyl; R3 is hydrogen or C1-4alkyl; and n is one, and when R3 is hydrogen n can also be two. Processes and intermediates for their preparation are described. Pharmaceutical compositions containing them are described, as is their use …
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 March 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 14, 2006.
- 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.