Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479025 | Process for the production of sodium carbonate | Rudolph Pruszko, Wayne C. Hazen | 2002-11-12 |
| 6464736 | Recrystallization process | Wayne C. Hazen, David R. Baughman, Rudolph Pruszko | 2002-10-15 |
| 6284005 | Sodium carbonate recrystallization | Wayne C. Hazen, Rudolph Pruszko, David R. Baughman, Ralph B. Tacoma | 2001-09-04 |
| 6173840 | Beneficiation of saline minerals | Rudolph Pruszko, Roland Schmidt | 2001-01-16 |
| 6092665 | Beneficiation of saline minerals | Roland Schmidt, Ralph B. Tacoma, Allen H. Moore, Allan L. Turner | 2000-07-25 |
| 5911959 | Method for purification and production of saline minerals from trona | John S. Wold, Wayne C. Hazen, Rudolph Pruszko, Roland Schmidt | 1999-06-15 |
| 5736113 | Method for beneficiation of trona | Wayne C. Hazen, Roland Schmidt | 1998-04-07 |
| 5651465 | Beneficiation of saline minerals | Roland Schmidt | 1997-07-29 |
| 5470554 | Benefication of saline minerals | Roland Schmidt | 1995-11-28 |
| 5106489 | Zircon-rutile-ilmenite froth flotation process | Roland Schmidt | 1992-04-21 |
| 4402919 | Process for the regeneration of mineral acids used to solubilize phosphate ores | Roland Schmidt | 1983-09-06 |