IMC FERTILIZER, INC., 2315 SANDERS ROAD, NORTHBROOK, ILLINOIS 60062, A DE CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5066471 Lowering post-precipitation in merchant acidExpiredNov 26, 90Nov 19, 91[C01B]
5002744 Method for defluorinating wet process phosphoric acidExpiredMay 11, 90Mar 26, 91[C01B]
4904375 Sodium silicate as a phosphate flotation modifierExpiredDec 09, 87Feb 27, 90[B03D]
4882134 Recovery of hydrogen fluoride from an aqueous solution containing ammonium fluoride and hydrogen fluorideExpiredApr 10, 87Nov 21, 89[C01B]
4762698 Method for increasing fluosilicic acid recovered from wet process phosphoric acid productionExpiredMay 07, 87Aug 09, 88[C01B]
4737273 Flotation process for recovery of phosphate values from oreExpiredJan 03, 86Apr 12, 88[B03D]
4726896 Method and apparatus for on-stream analysis of slurried oreExpiredMar 09, 87Feb 23, 88[B03D, G05D, B01D, G01F]
4725351 Collecting agents for use in the froth flotation of silica-containing oresExpiredSep 29, 86Feb 16, 88[B03D]
4716026 Defluorination kiln restriction control agent and methodExpiredJan 22, 86Dec 29, 87[C01B]
4699275 Apparatus for separating foreign bodies from granular feedsExpiredOct 28, 85Oct 13, 87[B07B]
4643883 Method of decolorizing wet process phosphoric acidExpiredJan 22, 86Feb 17, 87[C01B]
4640828 Separation of dissolved substances from wet process phosphoric acidExpiredOct 22, 85Feb 03, 87[C01B]
4639359 Process of removing cationic impurities from wet process phosphoric acidExpiredDec 16, 85Jan 27, 87[C01B]
4632814 Process for stabilizing phosphoric acidExpiredDec 20, 85Dec 30, 86[C01B]
4599156 Electrodialysis process for preparing hydrogen fluorideExpiredSep 27, 85Jul 08, 86[B01D]
4578249 Process for recovery of uranium from wet process H.sub.3 PO.sub.4ExpiredSep 02, 83Mar 25, 86[C25B, C01G]
4568454 Beneficiation of high carbonate phosphate rockExpiredAug 20, 84Feb 04, 86[B03D]
4562058 Process for crystallizing potassium sulfateExpiredMar 25, 85Dec 31, 85[C01F, C01D]
4545962 Recovery of uranium from a mixture of western uranium ore and phosphate rockExpiredOct 17, 79Oct 08, 85[C01G]
4543239 Phosphoric acid extraction processExpiredAug 21, 84Sep 24, 85[C01B]

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