Sulphonylaminocarbonyltriazolinones having substituents bonded via oxygen
CA 2189593 C · Owner: Schmidt, Robert R. · Inventors: Lurssen, Klaus; Santel, Hans-Joachim; Kluth, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel intermediates of formula II useful in the preparation of sulphonylaminocarbonyltriazolinones having substituents bonded via oxygen and to salts thereof and to processes for preparing the intermediates. A compound of formula II is a triazolinone of the general formula (II), (II), in which R1 represents amino, C1-C4-alkyl which is optionally substituted by fluorine, cyano, methoxy or ethoxy or, represents allyl, C3-C6-cycloalkyl benzyl, phenyl, C1-C3-, alkylamino, C3-C6-cycloalkylamino or di-(C1-C3-alkyl)-amino and, R2 represents C3-C6-cycloalkyl, or represents phenyl or benzyl which is optionally substituted by fluorine chlorine, and/or methyl.
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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 April 1, 1992 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2014.
- 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.