Process for the production and purification of sodium hydride
CA 2456917 A1 · Owner: De Vries, Hans · Inventors: Heller, Joerg; De Vries, Hans; Gerlach, Hans-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing sodium hydride whereby a , compound containing carbon is introduced into a melt medium at temperatures higher than the decomposition temperature of the sodium hydride around 420~C, which contains sodium hydride or a mixture of one or more alkalimetal hydrides excluding oxygen and humidity. The reaction product is subsequently separated from the reaction medium at temperatures <= 420~. The invention also relates to a method for purifying impure sodium hydride excluding oxygen and , humidity, whereby sodium hydride is introduced into a melt medium at temperatures higher than the decomposition temperature of the sodium hydride around 420~C, …
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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 July 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2024.
- 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.