Method of mosquito control
CA 2031313 C · Owner: Pittendrigh, Barry R. · Inventors: Pittendrigh, Barry R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the control of the development of mosquitoes in a body of water, by spreading on the body of water a particulate carbohydrate, compound. The carbohydrate compound may be a given compound that forms a hydrophilic gum-like layer once spread on the surface of the water. The gumlike, layer prevents the development of mosquito in the larvae and pupae stages. It is also, believed to inhibit the laying of eggs on the water surface by the female mosquito. The layer found is environmentally safe as the carbohydrates used are common in, food products.
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 December 3, 1990 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.