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Class Information
Number: 423/21.1
Name: Chemistry of inorganic compounds > Treating mixture to obtain metal containing compound > Rare earth metal (at. no. 21, 39, or 57-71)
Description: Processes in which the compound comprises one of the metals known as the "rare earth metals" and which has an atomic number of 21, 39, or 57-71, inclusive.

Sub-classes under this class:

Class Number Class Name Patents
423/21.5 Ion exchanging or liquid-liquid extracting 146

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8628734 Method for recovery of rare earths from fluorescent lamps Jan. 14, 2014
8623301 Solid oxide fuel cells, electrolyzers, and sensors, and methods of making and using the same Jan. 7, 2014
8524176 Rare earth recovery from phosphor Sep. 3, 2013
8512654 Strontium cerate nanoparticle synthesis method Aug. 20, 2013
8501124 Method for recovering rare-earth elements from a solid mixture containing a halophosphate and a compound of one or more rare-earth elements Aug. 6, 2013
8486354 Method for extracting rare earth material from monazite Jul. 16, 2013
8470270 Method for extracting rare earth elements from phosphogypsum Jun. 25, 2013
8470271 Process for chlorinating resources containing recoverable metals Jun. 25, 2013
8454912 Adsorbent, preparation method thereof and Sr-90/Y-90 generator using the same Jun. 4, 2013
8435472 Method of preparing nano-structured material(s) and uses thereof May. 7, 2013
8436052 Formulation and method for preparing gels comprising hydrous cerium oxide May. 7, 2013
8425654 Purification process for .sup.153Gd produced in natural europium targets Apr. 23, 2013
8425871 Single phase yttrium phosphate having the xenotime crystal structure and method for its synthesis Apr. 23, 2013
8362869 Stable thermistor based on a composition comprising rare earth metal Jan. 29, 2013
8361419 Cerium carbonate powder, method for preparing the same, cerium oxide powder made therefrom, method for preparing the same, and CMP slurry comprising the same Jan. 29, 2013
8328893 Method of producing oxide particles, slurry, polishing slurry, and method of polishing substrate Dec. 11, 2012
8329123 Method for preparing of cerium oxide powder for chemical mechanical polishing and method for preparing of chemical mechanical polishing slurry using the same Dec. 11, 2012
8323592 Method and apparatus for recovery of rare earth element Dec. 4, 2012
8303918 Method for preparing cerium carbonate powder using urea Nov. 6, 2012
8263028 Methods of recovering rare earth elements Sep. 11, 2012
8246717 Process for the recovery of metals from used nickel/metal hydride batteries Aug. 21, 2012
8216532 Methods of recovering rare earth elements Jul. 10, 2012
8182774 Eu(III) complex and nanosized EuSe crystal obtained therefrom May. 22, 2012
8173084 Yb:Y.sub.2O.sub.3 ceramic powders May. 8, 2012
8137645 Rare earth recovery from fluorescent material and associated method Mar. 20, 2012
8124037 Perovskite materials for solid oxide fuel cell cathodes Feb. 28, 2012
8088353 Group II metal sulfide phosphor precursor and method for producing phosphor Jan. 3, 2012
8048389 Cerium oxide-zirconium oxide-based mixed oxide and method for producing thereof Nov. 1, 2011
8021636 Preparation of rare-earth halide blocks Sep. 20, 2011
7993612 Recovery of rare earth elements Aug. 9, 2011
7976798 Method for recovery of rare earths from fluorescent lamps Jul. 12, 2011
7964164 Process for recovering titanium dioxide Jun. 21, 2011
7959885 Nanoparticle synthesis by solvothermal process Jun. 14, 2011
7955529 Synthesis for catalysis of bifunctional perovskite compound Jun. 7, 2011
7943106 Rare earth nanorods May. 17, 2011
7927391 Ceria based glass polishing composition and a process for the manufacture thereof Apr. 19, 2011
7867461 Method for preparing of cerium oxide powder for chemical mechanical polishing and method for preparing of chemical mechanical polishing slurry using the same Jan. 11, 2011
7862654 Treating agent for forming a fluoride coating film and method for forming a fluoride coating film Jan. 4, 2011
7820586 Composition based on zirconium oxide and oxides of cerium, lanthanum and of another rare earth, a method for preparing same and use thereof as catalyst Oct. 26, 2010
7815726 Treating agent for forming a fluoride coating film and method for forming a fluoride coating film Oct. 19, 2010
7799293 Actinide extraction methods Sep. 21, 2010
7754173 Rare earth oxide nanocrystals and methods of forming Jul. 13, 2010
7754168 Concentrate of fine ceria particles for chemical mechanical polishing and preparing method thereof Jul. 13, 2010
7754167 Method for separating trivalent americium from trivalent curium Jul. 13, 2010
7741396 Composites having tunable dielectric constants, methods of manufacture thereof, and articles comprising the same Jun. 22, 2010
7740814 Composite materials and method of its manufacture Jun. 22, 2010
7722841 Polymeric chelant and coagulant to treat metal-containing wastewater May. 25, 2010
7691767 Catalytic cracking catalyst for heavy oil and production process for olefin and fuel oil Apr. 6, 2010
7670578 Method for preparing rare-earth halide blocks Mar. 2, 2010
7641799 Method of separating isotopes Jan. 5, 2010

1 2 3 4 5 6

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