Thin invert compositions for spray application
CA 2081254 C · Owner: Johnson, Roy R. · Inventors: Johnson, Roy R.; Waldrum, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thin invert composition and method for applying agricultural products to a target area with minimal drift or evaporation is based on a water and oil mixture which is emulsified by minimal agitation so as to provide a low viscosity emulsion. The emulsion when sprayed through small spray orifices (e. g. 0.020 inch internal diameter) forms a thin invert wherein the water phase is enclosed in the oil phase and the droplet size is small (e.g. 1000 microns mean diameter) and uniform. The water phase carries a hydrophilic active agricultural product. The mixture can have 20 to 50% oil phase by weight, and 50 to 80% water phase by weight the water phase containing the active hydrophilic product …
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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 October 23, 1992 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 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.