Carbonyl sulphide fumigant and method of fumigation
CA 2128206 C · Owner: Commonwealth Scientific And Industrial Research Organisation · Inventors: Desmarchelier, Francis James Michael; Banks, Henry Jonathan; Ren, Yonglin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The gaseous chemical compound, carbonyl sulphide has hitherto been unknown as , a fumigant for the control of insects and mites. Experiments have shown conclusively that carbonyl sulphide can be used as such a fumigant, with fumigation properties comparable to those of phosphine and methyl bromide. The effectiveness of carbonyl sulphide against insects (both adult and immature stages), mites, termites and moulds is demonstrated. In addition its , low absorption by grain, lower flammability than phosphine, lack of influence on seed germination and apparent environmental , safety make carbonyl sulphide particularly beneficial as a fumigant of stored grain. It may also be used to fumigate …
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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 January 15, 1993 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2015.
- 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.