Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10399861 | Methods for the production of potassium sulphate from potassium-containing ores at high ambient temperatures | Richard W. Chastain, Ingrid T. BUCKHURST, Antoine LEFAIVRE | 2019-09-03 |
| 9139446 | Methods of processing solutions of potassium sulfate and magnesium sulfate, methods of producing potassium sulfate, and related systems | Steven L. Chastain, Michael Morrison, Richard W. Chastain, Donial M. Felton | 2015-09-22 |
| 8802048 | Methods of processing solutions of potassium sulfate and magnesium sulfate, methods of producing potassium sulfate, and related systems | Steven L. Chastain, Michael Morrison, Richard W. Chastain, Donial M. Felton | 2014-08-12 |
| 8551429 | Methods of processing polyhalite ore, methods of producing potassium sulfate, and related systems | Richard W. Chastain, Donial M. Felton, Daniel C. Neuman, Otto C. Schnauber | 2013-10-08 |
| 6576206 | Bicarbonate conversion in a carbonate monohydrate process | William C. Copenhafer | 2003-06-10 |
| 6322767 | Process for making sodium carbonate decahydrate from sodium carbonate/bicarbonate liquors | Richard W. Chastain | 2001-11-27 |
| 6251346 | Solution mining of carbonate/bicarbonate deposits to produce soda ash | Richard W. Chastain | 2001-06-26 |
| 5955043 | Production of sodium carbonate from solution mine brine | Richard W. Chastain | 1999-09-21 |
| 5766270 | Solution mining of carbonate/bicarbonate deposits to produce soda ash | Richard W. Chastain | 1998-06-16 |
| 5609838 | Equilibrium production of sodium carbonate from sodium bicarbonate | Richard W. Chastain | 1997-03-11 |