Process for pelletizing insecticidal n-hydrocarboyl phosphoroamidothioates and phosphoroamidothioates
CA 2023294 C · Owner: Trusler, James H. · Inventors: Trusler, James H.; Memula, Sadanand G.; Satre, Rodrick I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Insecticidal pellet compositions of N-hydrocarboyl phosphoroamidothioates and phosphoroamidodithioates are provided. These compositions have improved odor control, thermal stability, attrition resistance bulk density and handling characteristics over the powdered forms of the insecticides. Methods are provided for making such pellets, and in particular an extrusion method is provided in which the dry insecticidal composition is mixed with from 3-25% of a solvent to form a consistency of damp sandy loam and then extruded.
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 15, 1990 and granted May 12, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 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.