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Class Information
Number: 423/554
Name: Chemistry of inorganic compounds > Sulfur or compound thereof > Oxygen containing > Sulfate > Alkaline earth metal containing (mg, ca, sr, or ba)
Description: Products or processes wherein the compound contains magnesium, calcium, strontium or barium.

Sub-classes under this class:

Class Number Class Name Patents
423/555 Calcium 309

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8529155 Method of making pure salt from frac-water/wastewater Sep. 10, 2013
8523975 Salts of mineral nutrients stabilized with amino acids and/or ammonium salt, products and food supplements that contain them and procedures for obtaining same Sep. 3, 2013
8518357 Systems and methods for sequestering sulfur Aug. 27, 2013
8512665 Process for the production of nanoparticles using miniemulsions Aug. 20, 2013
8420215 Cyclic process for the preparation of barium sulphate and lithium metal phosphate compounds Apr. 16, 2013
8388915 Basic magnesium sulfate granule having high crush strength and process for production thereof Mar. 5, 2013
8273320 Method of making pure salt from frac-water/wastewater Sep. 25, 2012
8178069 Basic magnesium sulfate granule, and process for production thereof May. 15, 2012
8124039 Process of silicon tetrafluoride gas synthesis Feb. 28, 2012
8114366 Process for continuous production of fibrous basic magnesium sulfate particle Feb. 14, 2012
8088349 Clean method for preparing layered double hydroxides Jan. 3, 2012
7928033 Catalyst for reducing mercury, a mercury conversion unit, and an apparatus for measuring total mercury in combustion exhaust gas by using the same Apr. 19, 2011
7887776 Chemical process to produce hydrogen chloride and chloride-free compound potassium sulfate fertilizers or other metal sulfates Feb. 15, 2011
7780941 Potassium magnesium fertilizer Aug. 24, 2010
7771700 Sorbents for removal of mercury from flue gas cross reference to related applications Aug. 10, 2010
7686963 Magnesium thiosulfate as ozone quencher and scrubber Mar. 30, 2010
7575734 Process for preparing dispersible sulfate, preferably barium sulfate nanoparticles Aug. 18, 2009
7575735 Metal oxide and metal fluoride nanostructures and methods of making same Aug. 18, 2009
7455823 Process for the preparation of micron/nano sized inorganic material Nov. 25, 2008
7371357 Process for removal of pollutants May. 13, 2008
7288239 Method for producing alkaline earth sulphate nanoparticles Oct. 30, 2007
7285260 Synthesis method for carbon material based on Li.sub.xM.sub.1-yM'(XO.sub.4).sub.n Oct. 23, 2007
7211235 Method for producing hydrotalcites May. 1, 2007
7008606 Process for passivating sulfidic iron-containing rock Mar. 7, 2006
7001582 Micronized barium sulfate Feb. 21, 2006
6858562 Catalyst for decomposing organic harmful substances and method for decomposing organic halides by use thereof Feb. 22, 2005
6692656 Amphoteric magnesium buffers Feb. 17, 2004
6537962 Composite powder Mar. 25, 2003
6478971 Process for removing sulfate from an aqueous salt solution Nov. 12, 2002
6365122 Process for manufacturing potassium sulfate fertilizer and other metal sulfates Apr. 2, 2002
6306494 Fine particulate synthetic chalcoalumite compounds, process for their production, and heat insulator and agricultural film containing the fine particulate synthetic chalcoalumite compounds Oct. 23, 2001
6221332 Multiple stream high pressure mixer/reactor Apr. 24, 2001
6214313 High-purity magnesium hydroxide and process for its production Apr. 10, 2001
6203769 Process for the treatment of fluoboric electrolyte Mar. 20, 2001
6187277 Method for purifying gases Feb. 13, 2001
6099814 Method for processing acid effluents Aug. 8, 2000
6086842 Recycling of sodium hydroxide and production of gypsum from dry flue gas desulfurization Jul. 11, 2000
5980856 Synthetic chalcoalumite-type compounds and processes for producing the same Nov. 9, 1999
5976511 Ultraviolet rays-absorbing composition and process for producing the same Nov. 2, 1999
5861133 Synthetic chalcoalumite compounds and process for producing thereof Jan. 19, 1999
5814291 Simplified synthesis of anion intercalated hydrotalcites Sep. 29, 1998
5709730 Hydrometallurgical processing of flue dust Jan. 20, 1998
5707960 Amorphous sodium silicate-metal sulfate composite powder Jan. 13, 1998
5580377 Plate barium sulfate and process for producing the same Dec. 3, 1996
5554355 Oxide slurry for industrial process applications Sep. 10, 1996
5443622 Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper Aug. 22, 1995
5326548 Fibrous anhydrous magnesium oxysulfate and process for the preparation thereof Jul. 5, 1994
5324500 Method for processing residues of barium sulfide or strontium sulfide leaching Jun. 28, 1994
5312604 Work-up of waste materials from barium or strontium sulfide leaching May. 17, 1994
5281242 Method for recovering magnesium sulfate products from mixtures of epsomite and halite Jan. 25, 1994

1 2 3

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