Heterocyclic diones as pesticides and plant growth regulators
CA 2015242 C · Owner: Novartis Ag · Inventors: Lee, Shy-Fuh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the general formula I, (see formula I) wherein, A represents the group (i), (see formula I) in which any free hydrogen may be replaced by an agriculturally acceptable substituent; and B represents an optionally substituted aryl or heteroaryl group are disclosed as well as methods of, producing such compounds intermediates therefore, and their use as herbicides and acaricides.
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 April 24, 1990 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 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
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.