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Class Information
Number: 423/151
Name: Chemistry of inorganic compounds > Treating mixture to obtain metal containing compound > Iron group metal (fe, co, or ni) > Converting metal to magnetic form
Description: Processes including the step of changing a metal from a nonmagnetic to a magnetic form.

Sub-classes under this class:

Class Number Class Name Patents
423/152 At specified temperature 19

Patents under this class:

Patent Number Title Of Patent Date Issued
8584862 Method for continuous magnetic ore separation and/or dressing and related system Nov. 19, 2013
8575212 Organically chelated mineral compositions and methods thereof Nov. 5, 2013
8092777 Process for producing anisotropic magnetic material and anisotropic magnetic material Jan. 10, 2012
7571814 Method for separating metal values by exposing to microwave/millimeter wave energy Aug. 11, 2009
7404937 Production of synthetic rutile by continuous leaching Jul. 29, 2008
7163667 Production process for oxide magnetic material and oxide magnetic material Jan. 16, 2007
6923328 Method and apparatus for separating metal values Aug. 2, 2005
6627313 Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Sep. 30, 2003
6544673 Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Apr. 8, 2003
6319485 Magnetic material and production method thereof Nov. 20, 2001
5911967 Process and apparatus for production of ferric oxide from iron chloride solutions Jun. 15, 1999
5738717 Coloring pigment and method of manufacture Apr. 14, 1998
5660772 Process for making ultra-fine barium hexaferrite particles Aug. 26, 1997
5487878 Method for preparing perpendicularly magnetizable material usable on magnetic recording media Jan. 30, 1996
5378438 Benefication of titaniferous ores Jan. 3, 1995
5316746 High purity iron oxide and method for production hereof May. 31, 1994
5186920 Recovering TiO.sub.2 concentrates from TiO.sub.2 -containing substances Feb. 16, 1993
5076836 Process for the preparation of ferromagnetic metallic particles for magnetic recording Dec. 31, 1991
4565675 Process for treating and recovering pickling waste liquids for stainless steel Jan. 21, 1986
4497655 Process for production of high-purity metallic iron Feb. 5, 1985
4360379 Process for the removal of rust from cast iron borings and the like in preparation for melting Nov. 23, 1982
4320022 Dry granular calcined magnetic fraction obtained from chrysotile asbestos tailings Mar. 16, 1982
4309390 Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet Jan. 5, 1982
4308240 Recovery of cobalt and manganese from ash of residue from manufacture of trimellitic acid by acid extraction Dec. 29, 1981
4298580 Separation of cobalt and manganese from trimellitic acid process residue by precipitating as carbonates, redissolving as halides and removing cobalt by magnetic means Nov. 3, 1981
4298759 Separation of cobalt and manganese from trimellitic acid process residue by extraction, ion exchanger and magnet Nov. 3, 1981
4289529 Process for beneficiating sulfide ores Sep. 15, 1981
4276081 Process for beneficiating ores Jun. 30, 1981
4205979 Process for beneficiating oxide ores Jun. 3, 1980
4201748 Process for thermal-activation of chalcopyrite-pyrite concentrates May. 6, 1980
4185997 Process for treating basic converter slag Jan. 29, 1980
4176157 Calcining calcium sulphate dihydrate Nov. 27, 1979
4115106 Method for producing metallic oxide compounds Sep. 19, 1978
4067953 Process for upgrading ores containing baddeleyite Jan. 10, 1978
4054639 Process for preparing magnetite starting from ferrous sulphate solutions Oct. 18, 1977
4009263 Energized cobalt-containing animal feed Feb. 22, 1977
3994819 Method for the preparation of acicular particles containing iron and other divalent metals Nov. 30, 1976
3994829 Process for production of activated carbon Nov. 30, 1976
3970738 Process for producing iron oxide products from waste liquids containing ferrous salts Jul. 20, 1976

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