Sulphonylaminocarbonyltriazolinones having two substituents bonded via oxygen
CA 2078811 C · Owner: Konig, Klaus · Inventors: Santel, Hans-Joachim; Lurssen, Klaus; Haas, Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to new sulphonylaminocarbonyltriazolinones having two substituents bonded via oxygen of the formula (I), in which, R1 represents hydrogen or an optionally substituted radical from the series comprising alkyl alkenyl, alkinyl, cycloalkyl, cycloalkenyl and aralkyl R2 represents an optionally substituted radical from the series comprising alkyl, alkenyl, alkinyl cycloalkyl, cycloalkenyl and aralkyl, and R3 represents an optionally substituted radical from the series comprising alkyl, aralkyl, aryl and heteroaryl, and salts of compounds of the formula (I) further, processes and new intermediates for their preparation and their use as herbicides.
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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 September 22, 1992 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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.