2-(1-substituted-2-imidazolin-2-yl)benzoic and nicotinic acids and a method for their preparation
CA 2032593 C · Owner: American Cyanamid Company · Inventors: Guaciaro, Michael Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2-(1-Substituted-2-imidazolin-2-yl)benzoic and nicotinic acids, and derivatives thereof which are effective, in the control of undesirable plant species are described. Also described are a method for the herbicidal use of the compounds and a method for their preparation. Such nicotinic acids, and derivatives thereof, are illustrated as structural formula (I):, wherein X, Y, Z, A, B, R1 R2 and R3 are as defined in the, specification.
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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 December 18, 1990 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 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.