Substituted pyrimidine derivatives, a process for the preparation thereof and the use thereof as reagents
CA 2048842 C · Owner: Lang, Hans-Jochen · Inventors: Lang, Hans-Jochen; Utz, Roland; Geisen, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted pyrimidine derivatives, a process for the preparation thereof and the use thereof as reagents Pyrimidine derivatives of the formula I in which R1, R2, X and Y have the stated meaning the, salts thereof and a process for the preparation thereof are described. Because of their sorbitol-accumulating activity, they are suitable fox use as reagents for an advantageous pharmacological screening model for testing 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 August 9, 1991 and granted April 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 2013.
- 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.