Pyrimidone derivatives
CA 1237429 A · Owner: Hoffmann-La Roche Limited/Hoffmann-La Roche Limitee · Inventors: Kienzle, Frank; Kaiser, Ado
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Pyrimidone derivatives of the formula I, wherein n is the number 1 or 0, X, A1 and A2 are optionally mono-lower alkylated or di-lower alkylated methylene, or X is optionally lower alkylated nitrogen R is hydrogen or lower-alkyl and Y and Z together are a group =NR5, or R and Z together are a N-C-bond and Y is a group -N(H)R5, R1, R2 and R3 are hydrogen lower-alkyl or, lower-alkoxy, or two of R1 R2 and R3 on adjacent carbon, atoms are methylenedioxy or ethylenedioxy R4 is hydrogen or lower-alkyl, R5 is phenyl optionally substituted by R6 R7 and R8, and R6, R7 and R8 are chlorine fluorine, bromine, lower-alkyl or lower-alkoxy with the proviso that at least one of the methylene …
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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- 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.