Method for the production of water-free rare earth metal halogenides, synthesis mixtures containing water-free rare earth metal halogenides and use thereof
CA 2591193 C · Owner: Wietelmann, Ulrich · Inventors: Wietelmann, Ulrich; Lischka, Uwe; Roeder, Jens
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 wherein rare earth metal oxides are reacted with halogenation agents of general formula (1) wherein M= Si, Ge, Sn, Ti, Zr, Hf; Hal= CI Br, I; X1,X2,X3 = independently from each other CI Br, I, H, alkoxy (-OR), wherein R represents an organo radical having 1-20 atoms alkyl , having 1-20 C atoms or aryl with 6-20 C atoms wherein the alkyl or arly , radicals can include one or several halogen substituents selected from the group of F, CI, Br or I; in an aprotic polar solvent. The invention also relates to synthesis mixtures containing water-free rare earth metal halogenides and the use thereof
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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 12, 2005 and granted April 28, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.