Dry, water-soluble, substituted phenoxy and/or benzoic acid herbicides and method of preparing same
CA 2115760 C · Owner: Cahoy, Roger P. · Inventors: Van Haften, John L.; Cahoy, Roger P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dry, water-soluble, substituted phenoxy and/or benzoic acid herbicide is prepared by dry blending the herbicide in acid form with a dry solid solubilization medium selected from the group consisting of diammonium phosphate dipotassium phosphate, disodium phosphate trisodium phosphate and tripotassium phosphate. At least about 0.6 to about 1.15 moles of the medium are provided for each mole of active herbicidal agent in the initially dry blended mixture.
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 13, 1992 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.