Substituted pyrimidine derivatives, their uses and a process for the preparation thereof
CA 2010588 C · Owner: Weidmann, Klaus · Inventors: Geisen, Karl; Nimmesgern, Hildegard; Lang, Hans-Jochen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pyrimidine derivatives of the formula I in which R1, R2, R3, R4 and R5 have the indicated meanings the, salts thereof, and a process for the preparation thereof are described. Because of their sorbitol-accumulating activity, they are suitable as a tool in a pharmacological screening model for aldose reductase inhibitors.
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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
- Filed February 21, 1990 and granted January 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 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
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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.