Pyrimidine derivatives
CA 2020370 A1 · Owner: Buhlmayer, Peter · Inventors: Herold, Peter; Buhlmayer, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4-17653/+, Novel pyrimidine derivatives Abstract, Compounds of the formula, (I) their tautomers and salts, in which Z is 0 S or N(R) and R is hydrogen or an aliphatic hydrocarbon radical; R1 is an unsubstituted or substituted aliphatic hydrocarbon radical a, cycloaliphatic or araliphatic hydrocarbon radical or an aromatic radical; R2 and R3 independently of one another, are halogen acyl, an aromatic radical, unsubstituted or substituted amino, or carboxyl which, if desired may be esterified or amidated; or R2 is -Zl-R'2 and R3 is -Z2-R'3, Z1 and Z2 independently of one another being a bond O or, S(O)n and n being 0, 1 or 2, and R'2 and R'3 independently of one another being hydrogen an …
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 July 4, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 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.