FMC WYOMING CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C22B PRODUCTION OR REFINING OF METALS 226
 
  
 
C01D COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM 114

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5283054 Process for producing sodium salts from brines of sodium oresMar 30, 93Feb 01, 94[C22B]
5262134 Process for producing sodium salts from brines of sodium oresFeb 21, 92Nov 16, 93[C01D]
5238664 Soda ash productionJun 27, 91Aug 24, 93[C22B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0031,575 Pulp Bleaching and Alkaline Extraction MethodAbandonedApr 27, 11Feb 09, 12[D21C]
7018594 Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonateExpiredNov 18, 02Mar 28, 06[C01D]
6436154 Use of dodecylbenzene sulfonic acid or salt as a scale inhibitorExpiredSep 28, 00Aug 20, 02[C01D]
6322767 Process for making sodium carbonate decahydrate from sodium carbonate/bicarbonate liquorsExpiredMay 19, 00Nov 27, 01[C01D]
5192164 Soda ash productionExpiredJul 25, 91Mar 09, 93[B09B, E02D]
5043149 Soda ash productionExpiredAug 29, 90Aug 27, 91[C22B]
4781899 Purification of crystallized solids made via continuous crystallizationExpiredJul 27, 84Nov 01, 88[C22B, C01D]
4519806 Enhanced recovery of soda ash from aqueous sodium carbonate solutions containing Na.sub.2 SO.sub.4 - and NaClExpiredNov 26, 82May 28, 85[C01B, C01D]
4401635 Recovery of alkali values from salt-containing trona depositsExpiredJan 19, 81Aug 30, 83[C22B, C01D, E21C]
4344650 Recovery of alkali values from trona depositsExpiredDec 15, 80Aug 17, 82[E21B]
4299799 Carbon treatment of monohydrate crystallizer liquorExpiredApr 09, 80Nov 10, 81[C22B, C01D]
4288419 Enhanced recovery of sodium carbonate from NaCl-containing sodium carbonate solutionsExpiredApr 04, 80Sep 08, 81[E21B, C01D]
4285915 Recovery of alkali values from trona oreExpiredApr 23, 80Aug 25, 81[C22B, F21B, C01D]
4283372 Recovery of alkali values from sodium bicarbonate-containing ore with ammoniaExpiredJan 29, 80Aug 11, 81[C22B, C01D, E21C]
4183901 Process for crystallization of anhydrous sodium carbonateExpiredJul 24, 78Jan 15, 80[C01D]

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