Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6479025 | Process for the production of sodium carbonate | Dale Lee Denham, Jr., Wayne C. Hazen | 2002-11-12 |
| 6464736 | Recrystallization process | Wayne C. Hazen, Dale Lee Denham, Jr., David R. Baughman | 2002-10-15 |
| 6284005 | Sodium carbonate recrystallization | Wayne C. Hazen, Dale Lee Denham, Jr., David R. Baughman, Ralph B. Tacoma | 2001-09-04 |
| 6173840 | Beneficiation of saline minerals | Roland Schmidt, Dale Lee Denham, Jr. | 2001-01-16 |
| 5911959 | Method for purification and production of saline minerals from trona | John S. Wold, Wayne C. Hazen, Roland Schmidt, Dale Lee Denham, Jr. | 1999-06-15 |