Pesticidal compositions comprising an aerated gel containing hydrophobic silica
CA 2390146 C · Owner: Le Quesne, Lesley · Inventors: Le Quesne, Lesley; Twydell, Roland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pesticidal composition comprises, as the sole pesticidally-active component a storage-stable aerated gel composition comprising 30 to 97 % by weight of water, 0.2 to 5 % by weight of a gelling agent selected from xanthan gum sodium alginate and neutralised carboxyvinyl polymer and 2 to 5 % by weight of a fine particulate hydrophobic silicone-treated silica having a surface area of from 80 to 300 m2/g. The composition is in the form of fine particles of an aqueous gel containing the water and gelling agent the surfaces of which fine , particles are coated with a coating of the finely particulate hydrophobic silica. The composition is useful in a method of controlling pests …
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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 November 15, 2000 and granted January 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2022.
- 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
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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.