Process for the preparation of aminotriazine derivatives
CA 2029838 C · Owner: Ciba-Geigy Ag · Inventors: Beriger, Ernst; Kristinsson, Haukur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of aminotriazine derivatives of the formula (see formula I), wherein, R is hydrogen C1-C6alkyl, C3-C6cycloalkyl, C1-C4alkyl substituted by from 1 to 10, halogen atoms or by from 1 to 3 radicals from the group C1-C3alkoxy C1-, C3alkylthio and, phenyl, phenyl or phenyl substituted by from 1 to 3 radicals from the group halogen, methyl, ethyl, methoxy, methylthio and nitro which process comprises reacting , with hydrazine hydrate a compound of formula II (see formula II), wherein R1 is hydrogen C1-C4alkyl, C3-C6cycloalkyl, C1-C4alkyl substituted by from 1 to, 9 chlorine atoms, C1-C3alkoxy C1-C3alkylthio, C1-C3alkylsulfinyl, C1- C3alkylsulfonyl, phenyl, phenyl …
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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 November 13, 1990 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 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.