Substituted fluoroalkoxyphenylsulfonylurea
CA 2440280 C · Owner: Wachendorff-Neumann, Ulrike · Inventors: Wachendorff-Neumann, Ulrike; Gesing, Ernst-Rudolf; Pontzen, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to substituted fluoroalkoxyphenylsulfonylureas of the general , formula (I), (see formula I) in which, n, A, R1, R2, R3 and R4 are as defined in the description to their use as plant treatment agents in particular as herbicides and , fungicides and , to a process and intermediates for their preparation.
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 February 27, 2002 and granted May 24, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2024.
- 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.