Pyrimidine derivatives
CA 2014457 C · Owner: Imperial Chemical Industries Plc · Inventors: Mills, Stuart Dennett; Marshall, Paul William; Mcloughlin, Bernard Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns novel aminopyrimidinium salts of the formula I:, in which R1 is alkyl, alkenyl cycloalkyl, phenyl, phenylalkyl or, cycloalkyl-alkyl; one of R2 and R6 is a basic group selected from amino, alkylamino, dialkylamino of up to eight carbon atoms pyrrolidino, piperidino and morpholino; and the other of R2 and R6 is hydrogen, alkyl, alkenyl, alkoxyalkyl, phenyl phenylalkyl, cycloalkyl, or cycloalkyl-alkyl; or both of R2 and R6 are basic groups as mentioned above; and R5 is hydrogen, (1-4C)alkyl or (3-6C)alkenyl; or R2 is a basic group as mentioned above and R5 and R6 together form, alkylene or together with the appendant carbon atoms of the pyrimidine ring, complete a …
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 April 12, 1990 and granted September 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.