Salicyloyl(thio)ether derivatives, their preparation and intermediates for ther preparation
CA 2075586 C · Owner: Saupe, Thomas · Inventors: Saupe, Thomas; Meyer, Norbert; Vogelbacher, Uwe Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Salicyloyl(thio)ether derivatives of the formula I where X is oxygen or sulfur and Z is carbon or nitrogen and the radicals R1 to R4 and A have the meanings given in the disclosure, and processes form preparing the same. These derivatives have improved herbicidal properties or other properties desirable in crop protection such as, growth-regulating or fungicidal activity.
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 August 7, 1992 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.