Method for preparing rare-earth halide blocks
CA 2507283 A1 · Owner: Iltis, Alain · Inventors: Iltis, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for preparing a polycrystalline halide block of formula A¿e?Ln¿f?X(¿3f?+¿e?) wherein: Ln represents one or more rare earth(s); X represents one or more halogen atom(s) selected among Cl Br or I; and A represents one or more alkali(s) such as K Li, Na, Rb or Cs; e may be nil, being not more than 3f and f being not less than 1, with low water and oxyhalide content. Said method comprises the following steps: heating a mixture of at least one compound containing at least one Ln-X bond and a sufficient amount of NH¿4?X to obtain the desired oxyhalide content said step resulting in a melt including the rare earth halide said heating step being followed by a cooling …
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 November 13, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 13, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2025.
- 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.