Metaldehyde-containing pesticides
CA 2083044 C · Owner: Tavener, Sally · Inventors: Misselbrook, John; Davies, Margareta
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The pesticidal effectiveness of metaldehyde which is difficult to dissolve or , disperse can be improved by mixing it with, one or more surface active agents and milling to a fine particle size preferably less than 30 microns, and subsequent application optionally with the addition of a suitable film-forming polymer such as a , styrene acrylic latex, to a carrier material such as bran. meal grain, flour or finely divided silica. Finely milled metaldehyde formulations made this way are highly effective molluscicides.
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 May 17, 1991 and granted March 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
- 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.