Fumigation apparatus
CA 2085435 C · Owner: Arita, Akira · Inventors: Arita, Akira; Sato, Tetsunori; Tsutsumi, Teruyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fumigation apparatus is provided which uses mixed gas of hydrogen phosphide and methyl bromide said, mixed gas containing hydrogen phosphide at a high concentration, and which is free from the risk of ignition and safe. The apparatus, furthermore, is capable of fumigation that can completely kill noxious insects infesting green plants within a short time exhibiting, very little phytotoxicity on the plants and leaving extremely little residual fumigating agent after fumigation. Said apparatus is composed of (a) a system for purging air and hydrogen phosphide in a hydrogen phosphide path; (b) a system for hydrogen phosphide supply and transfer from a hydrogen phosphide bomb to a mixer …
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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 December 15, 1992 and granted October 6, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2014.
- 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.