2133455
2780520
2887360
3113834
3119655
3236590
3246962
3264057
3273959
3336106
More ...
3449067
3451767
3482934
3498744
3506432
3528766
3531240
3542844
3551097
3634999
3647365
3653847
3656892
3700280
3717698
3751560
3779601
3779602
3780160
3792902
3802848
3819805
3838189
3852427
3855397
3868444
3870784
3891393
Process for producing sodium carbonate
Patent #: 3933977
Issued on: 01/20/1976
Inventor: Ilardi , et al.
Electrolytic manufacture of chlorine and sodium carbonate
Patent #: 3944474
Issued on: 03/16/1976
Inventor: Verlaeten
Production of low bulk density product from sodium bicarbonate
Patent #: 3944500
Issued on: 03/16/1976
Inventor: Gancy , et al.
Process for the solution mining of subterranean sodium bicarbonate bearing ore bodies
Patent #: 3953073
Issued on: 04/27/1976
Inventor: Kube
Process for separation of nahcolite from oil shale
Patent #: 3962403
Issued on: 06/08/1976
Inventor: Wyslouzil
Clarifier process for producing sodium carbonate
Patent #: 3981686
Issued on: 09/21/1976
Inventor: Lobunez , et al.
Production of low bulk density product from sodium bicarbonate by the use of an inert gas stream
Patent #: 3984527
Issued on: 10/05/1976
Inventor: Gancy , et al.
Recovery of soda values from sodium carbonate crystallizer purge liquors
Patent #: 3991160
Issued on: 11/09/1976
Inventor: Gancy , et al.
Method of solution mining potassium chloride from subterranean deposits
Patent #: 3994531
Issued on: 11/30/1976
Inventor: Dillard, Jr. , et al.
Preferential solution mining process
Patent #: 4007964
Issued on: 02/15/1977
Inventor: Goldsmith
Producing sodium carbonate monohydrate from carbonate solution including addition of aluminum ions
Patent #: 4019872
Issued on: 04/26/1977
Inventor: Walden
Trona calcination
Patent #: 4021525
Issued on: 05/03/1977
Inventor: Poncha
Soluble silicate reduction in calcined trona liquors
Patent #: 4021526
Issued on: 05/03/1977
Inventor: Gancy , et al.
Production of sodium carbonate
Patent #: 4021527
Issued on: 05/03/1977
Inventor: Baadsgaard
Soluble silicate reduction in sodium carbonate crystallizer mother liquors
Patent #: 4022867
Issued on: 05/10/1977
Inventor: Gancy , et al.
Trona calcination
Patent #: 4022868
Issued on: 05/10/1977
Inventor: Poncha
Process for the production of sodium bicarbonate from diaphram cell liquors
Patent #: 4032616
Issued on: 06/28/1977
Inventor: Artur , et al.
Recovery of soda values and heat from sodium carbonate crystallizer purge liquors
Patent #: 4039617
Issued on: 08/02/1977
Inventor: Kuo
Treatment of sodium carbonate crystallizer mother liquors
Patent #: 4039618
Issued on: 08/02/1977
Inventor: Gancy , et al.
Recovery of soda values from sodium carbonate crystallizer purge liquors
Patent #: 4044097
Issued on: 08/23/1977
Inventor: Gancy , et al.
Sulfur dioxide removal using thermally crushed nahcolite
Patent #: 4062926
Issued on: 12/13/1977
Inventor: Knight
In situ solution mining technique
Patent #: 4082358
Issued on: 04/04/1978
Inventor: Learmont
Use of tributoxyethylphosphate to control foam in the production of soda ash from trona
Patent #: 4083939
Issued on: 04/11/1978
Inventor: Lobunez, et al.
Foam prevention in sodium carbonate crystallization
Patent #: 4104033
Issued on: 08/01/1978
Inventor: Mahn , et al.
Solution mining of minerals from vertically spaced zones
Patent #: 4105252
Issued on: 08/08/1978
Inventor: Moore
Well perforating method for solution well mining
Patent #: 4113314
Issued on: 09/12/1978
Inventor: Savanick , et al.
Process of recovering sodium carbonate from spent pulping liquors
Patent #: 4138312
Issued on: 02/06/1979
Inventor: Gill , et al.
Methods for recovery and recycling of chemicals from sodium sulfite and sodium bisulfite pulping operations
Patent #: 4148684
Issued on: 04/10/1979
Inventor: Farin
Method of preparing sodium liquors low in calcium
Patent #: 4151261
Issued on: 04/24/1979
Inventor: Poncha , et al.
Process for producing soda ash from natural alkali metal carbonate-containing ores
Patent #: 4158043
Issued on: 06/12/1979
Inventor: Gloster
Multi-stage crystallization of sodium carbonate
Patent #: 4160812
Issued on: 07/10/1979
Inventor: Conroy , et al.
Regeneration of scale-coated activated carbon with acid wash
Patent #: 4169812
Issued on: 10/02/1979
Inventor: Smith , et al.
Process for crystallization of anhydrous sodium carbonate
Patent #: 4183901
Issued on: 01/15/1980
Inventor: Ilardi , et al.
Process for the separation of insoluble materials in the production of soda ash
Patent #: 4202667
Issued on: 05/13/1980
Inventor: Conroy , et al.
Method for improving solution flow in solution mining of a mineral
Patent #: 4214791
Issued on: 07/29/1980
Inventor: Moore
Apparatus for production of sodium bicarbonate
Patent #: 4217330
Issued on: 08/12/1980
Inventor: Nakaya , et al.
Solution mining water soluble salts at high temperatures
Patent #: 4232902
Issued on: 11/11/1980
Inventor: Cuevas
In situ processing of mined oil shale
Patent #: 4234230
Issued on: 11/18/1980
Inventor: Weichman
Process for the production of a basic carbonate of aluminum and an alkali or alkali earth metal
Patent #: 4238458
Issued on: 12/09/1980
Inventor: Misra
Solution mining potassium chloride from heated subterranean cavities
Patent #: 4239287
Issued on: 12/16/1980
Inventor: Goldsmith
Method for optimal placement and orientation of wells for solution mining
Patent #: 4249776
Issued on: 02/10/1981
Inventor: Shuck , et al.
Preparation of sodium carbonate anhydride
Patent #: 4252781
Issued on: 02/24/1981
Inventor: Fujita , et al.
Method for the manufacture of crystals of sodium carbonate monohydrate
Patent #: 4260594
Issued on: 04/07/1981
Inventor: Verlaeten , et al.
Recovery of alkali values from sodium bicarbonate-containing ore with ammonia
Patent #: 4283372
Issued on: 08/11/1981
Inventor: Frint , et al.
Integrated in situ shale oil and mineral recovery process
Patent #: 4285547
Issued on: 08/25/1981
Inventor: Weichman
Double crystallization process to produce low organic, low silica soda ash
Patent #: 4286967
Issued on: 09/01/1981
Inventor: Booth, Jr. , et al.
Enhanced recovery of sodium carbonate from NaCl-containing sodium carbonate solutions
Patent #: 4288419
Issued on: 09/08/1981
Inventor: Copenhafer , et al.
Process for producing sodium carbonate from complex brines
Patent #: 4291002
Issued on: 09/22/1981
Inventor: Arnold , et al.
Well for the solution mining of salt from an underground salt formation and a method for operating said well
Patent #: 4325579
Issued on: 04/20/1982
Inventor: Kwantes , et al.
Soda ash production
Patent #: 4341744
Issued on: 07/27/1982
Inventor: Brison , et al.
Recovery of alkali values from trona deposits
Patent #: 4344650
Issued on: 08/17/1982
Inventor: Pinsky , et al.
Solution mining process
Patent #: 4358157
Issued on: 11/09/1982
Inventor: Showalter
Solution mining process
Patent #: 4358158
Issued on: 11/09/1982
Inventor: Showalter
Polymers for controlling soda ash crystal formation
Patent #: 4374102
Issued on: 02/15/1983
Inventor: Connelly , et al.
Process for the in situ recovery of both petroleum and inorganic mineral content of an oil shale deposit
Patent #: 4375302
Issued on: 03/01/1983
Inventor: Kalmar
Electrostatic enrichment of trona and nahcolite ores
Patent #: 4375454
Issued on: 03/01/1983
Inventor: Imperto , et al.
Recovery of alkali values from salt-containing trona deposits
Patent #: 4401635
Issued on: 08/30/1983
Inventor: Frint
Solution mining of an inclined structure
Patent #: 4411474
Issued on: 10/25/1983
Inventor: Higgins
Multiple-bed solution mining of an inclined structure
Patent #: 4418960
Issued on: 12/06/1983
Inventor: Higgins
Single well-multiple cavity solution mining of an inclined structure
Patent #: 4425003
Issued on: 01/10/1984
Inventor: Huff
Dry carbonation process
Patent #: 4459272
Issued on: 07/10/1984
Inventor: Krieg , et al.
Production of alumina from aluminum-containing mineral ores with sodium bicarbonate
Patent #: 4468375
Issued on: 08/28/1984
Inventor: Misra
Sodium carbonate (soda ash) crystal modification
Patent #: 4472280
Issued on: 09/18/1984
Inventor: Keeney
Cyclic solution mining of borate ores
Patent #: 4475771
Issued on: 10/09/1984
Inventor: Atwood , et al.
Method of continuously controlling crystal fines formation
Patent #: 4478599
Issued on: 10/23/1984
Inventor: Puri , et al.
Solution mining of trona or nahcolite ore with aqueous NaOH and HCl solvents
Patent #: 4498706
Issued on: 02/12/1985
Inventor: Ilardi , et al.
Enhanced recovery of soda ash from aqueous sodium carbonate solutions containing Na2 SO4 - and NaCl
Patent #: 4519806
Issued on: 05/28/1985
Inventor: Copenhafer , et al.
Production of soda ash from nahcolite
Patent #: 4557910
Issued on: 12/10/1985
Inventor: Meadow
Process for the recovery of sodium carbonate from salt mixtures
Patent #: 4564508
Issued on: 01/14/1986
Inventor: Fairweather , et al.
Separation and purification of salts in a non-convective solar pond
Patent #: 4569676
Issued on: 02/11/1986
Inventor: Swinkels , et al.
Process for recovering sodium carbonate from trona and other mixtures of sodium carbonate and sodium bicarbonate
Patent #: 4584077
Issued on: 04/22/1986
Inventor: Chlanda , et al.
Solution mining process
Patent #: 4586752
Issued on: 05/06/1986
Inventor: Showalter
Process for solution mining
Patent #: 4630868
Issued on: 12/23/1986
Inventor: Jones , et al.
Solution mining of sodium minerals with acids generated by electrodialytic water splitting
Patent #: 4636289
Issued on: 01/13/1987
Inventor: Mani , et al.
Solution mining of trona or nahcolite ore with electrodialytically-produced aqueous sodium hydroxide
Patent #: 4652054
Issued on: 03/24/1987
Inventor: Copenhafer , et al.
Production of sodium bicarbonate by reversion of soda-type feed salt
Patent #: 4654204
Issued on: 03/31/1987
Inventor: Copenhafer , et al.
Preparation of high bulk density anhydrous sodium carbonate crystals
Patent #: 4738836
Issued on: 04/19/1988
Inventor: Poncha , et al.
Wet calcination of alkali metal bicarbonates in hydrophobic media
Patent #: 4743439
Issued on: 05/10/1988
Inventor: Ready
Solution mining
Patent #: 4753485
Issued on: 06/28/1988
Inventor: Goodhart
Purification of crystallized solids made via continuous crystallization
Patent #: 4781899
Issued on: 11/01/1988
Inventor: Rauh , et al.
Soda ash manufacture
Patent #: 4814151
Issued on: 03/21/1989
Inventor: Benke
Nahcolite solution mining process
Patent #: 4815790
Issued on: 03/28/1989
Inventor: Rosar , et al.
Recovery of sodium carbonate values from contaminated dilute soda ash streams
Patent #: 4869882
Issued on: 09/26/1989
Inventor: Dome , et al.
Co-disposal pollution control method-II
Patent #: 4946311
Issued on: 08/07/1990
Inventor: Rosar, et al.
Soda ash production
Patent #: 5043149
Issued on: 08/27/1991
Inventor: Frint, et al.
Process for producing dawsonite
Patent #: 5078983
Issued on: 01/07/1992
Inventor: Herold
SOx NOx pollution control composition
Patent #: 5082586
Issued on: 01/21/1992
Inventor: Hooper
Soda ash production
Patent #: 5192164
Issued on: 03/09/1993
Inventor: Frint, et al.
Soda ash production
Patent #: 5238664
Issued on: 08/24/1993
Inventor: Frint, et al.
Method and apparatus for solution mining
Patent #: 5246273
Issued on: 09/21/1993
Inventor: Rosar
Process for producing sodium salts from brines of sodium ores
Patent #: 5262134
Issued on: 11/16/1993
Inventor: Frint, et al.
Process for producing sodium carbonate, sodium bicarbonate and associated compounds
Patent #: 5270023
Issued on: 12/14/1993
Inventor: May, et al.
Process for producing sodium bicarbonate from natural soda salts
Patent #: 5275794
Issued on: 01/04/1994
Inventor: Luna
Process for producing sodium salts from brines of sodium ores
Patent #: 5283054
Issued on: 02/01/1994
Inventor: Copenhafer, et al.
Process for the recovery of the sodium hydroxide and sodium chloride from the effluent of a diaphragm cell as solid sodium bicarbonate
Patent #: 5288472
Issued on: 02/22/1994
Inventor: Ruiz
Process for the crystallization of sodium bicarbonate
Patent #: 5290322
Issued on: 03/01/1994
Inventor: Breton, et al.
Molten carbonate fuel cell sulfur scrubber and method using same
Patent #: 5308456
Issued on: 05/03/1994
Inventor: Kunz, et al.
Preparation of granulated alkaline earth metal carbonate
Patent #: 5362688
Issued on: 11/08/1994
Inventor: Porta, et al.
Apparatus and process used in working windrowed ingredients to produce pre-wet cycle mushroom compost
Patent #: 5395417
Issued on: 03/07/1995
Inventor: Thomas
Installation and process for the crystallization of an inorganic substance and process and installation for the crystallization of sodium carbonate monohydrate
Patent #: 5396863
Issued on: 03/14/1995
Inventor: Ninane, et al.
Process for making sodium bicarbonate from Nahcolite-rich solutions
Patent #: 5588713
Issued on: 12/31/1996
Inventor: Stevenson
Equilibrium production of sodium carbonate from sodium bicarbonate
Patent #: 5609838
Issued on: 03/11/1997
Inventor: Neuman, et al.
Method for recovery of alkali values from trona using sequential crystallization
Patent #: 5618504
Issued on: 04/08/1997
Inventor: Delling, et al.
Method for recovery of alkali values from trona using two-stage leaching
Patent #: 5624647
Issued on: 04/29/1997
Inventor: Zolotoochin, et al.
Method for sodium carbonate compound recovery and formation of ammonium sulfate
Patent #: 5654351
Issued on: 08/05/1997
Inventor: Kresnyak, et al.
Process for solution mining underground evaporite ore formations such as trona
Patent #: 5690390
Issued on: 11/25/1997
Inventor: Bithell
Solution mining of carbonate/bicarbonate deposits to produce soda ash Patent #: 5766270
Issued on: 06/16/1998
Inventor: Neuman, et al.
January 10, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
