Composition for producing phosphine-containing gas
CA 2178545 C · Owner: Reichmuth, Christoph · Inventors: Feja, Franziskus Horn; Reichmuth, Christoph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal phosphide composition is disclosed for generating a mixture of phosphine and diluent gas(es) presented ready for use in a hydrolysis process or apparatus in the form of a free-flowing particulate metal phosphide material composed of loose particles of said metal phosphide essentially free of metal phosphide dust essentially free of hydrolysis retarding agents and essentially free of hydrophobic substances in the form of coatings or hydrophobising additives. In use the hydrolysable metal phosphide preferably magnesium phosphide, is released directly into liquid water under an atmosphere of gas inert to phosphine. The generated mixture of phosphine and inert carrier gas e.g. CO2, can …
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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 June 7, 1996 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2018.
- 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.