Formulation process
CA 1297692 C · Owner: Bull, Alan Frank · Inventors: Bull, Alan Frank; Knowles, David Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process of preparing a solid herbicidal composition containing a bipyridylium diquaternary salt in admixture with a diluent comprising an inorganic salt which, comprisas mixing a concentrated aqueous solution of the bipyridylium salt with the inorganic salt to give a slurry, drying the slurry, crushing the solid product obtained by drying, and sieving the crushed product to obtain granules of the required size.
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
- Granted March 24, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 24, 2009.
- 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.