Buchloe dactyloides extracts having insecticidal properties
CA 2230245 C · Owner: Pioneer Hi-Bred International, Inc. · Inventors: Balasubramanian, Nandha Kumar; Mundell, Scott A.; Czapla, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention comprises a substance or plurality of substances extracted from the seeds of buffalo grass, Buchloe dactyloides. The crude extract was found to comprise one or a plurality of substances having molecular weights of less than 20 kDa which are natural insecticides against corn rootworm. Bioassays show corn rootworm mortality of up to 100 % when larvae are fed a diet containing crude or purified buffalo grass extract.
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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 May 27, 1997 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2019.
- 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.