Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12227439 | Systems to treat PFAS and other persistent organic compounds and oxidizable matter in aqueous fluids | Richard W. Alexander | 2025-02-18 |
| 12053809 | Reagent system for treating mercury-contaminated material | — | 2024-08-06 |
| 11724291 | Closure methods for mines | William H. Simon, Richard W. Alexander | 2023-08-15 |
| 11697043 | Method and reagents for treating materials contaminated with mercury, PFAS, or other contaminants | Jody Bickford | 2023-07-11 |
| 11680001 | Systems and methods for treating acidity, heavy metals, and solids in acid mine drainage and other aqueous fluids | Richard W. Alexander | 2023-06-20 |
| 11535516 | Method and reagent system for remediating mine waste and other solid waste contaminated with heavy metals | — | 2022-12-27 |
| 11383982 | Reagent system for remediating mine waste and other solid waste contaminated with heavy metals | — | 2022-07-12 |
| 11059008 | Revolving chamber oscillation mixing devices and associated methods | Richard W. Alexander | 2021-07-13 |
| 10960444 | Closure methods for mines | William H. Simon, Richard W. Alexander | 2021-03-30 |
| 10926308 | Method and reagent system for treating mercury-contaminated material | — | 2021-02-23 |
| 7404693 | Method and system for a containment system, such as a seamless containment cap for solid waste constructed of polymer-modified asphalt | Ronald L. Terrel, Gale Schwiesow | 2008-07-29 |
| 7077602 | Method and system for containment, such as a containment cap for solid waste constructed of modified asphalt | Ronald L. Terrel, Gale Schwiesow | 2006-07-18 |
| 6635796 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials | Dhiraj Pal, Steven A. Chisick | 2003-10-21 |
| 6309337 | Method of forming an insoluble phosphate mineral species | Dhiraj Pal | 2001-10-30 |
| 6291736 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials | Dhiraj Pal, Steven A. Chisick | 2001-09-18 |
| 6258018 | Fixation and stabilization of metals in contaminated soils and materials | Dhiraj Pal, Steven A. Chisick | 2001-07-10 |
| 6139485 | Fixation and stabilization of metals in contaminated soils and materials | Dhiraj Pal | 2000-10-31 |
| 5994608 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials | Dhiraj Pal, Steven A. Chisick | 1999-11-30 |
| 5916123 | Fixation and stabilization of metals in contaminated soils and materials | Dhiraj Pal | 1999-06-29 |
| 5732367 | Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials | Steven A. Chisick | 1998-03-24 |
| 5569155 | Fixation and stabilization of metals in contaminated materials | Dhiraj Pal | 1996-10-29 |
| 5527982 | Fixation and stabilization of metals in contaminated materials | Dhiraj Pal | 1996-06-18 |
| 5397478 | Fixation and stabilization of chromium in contaminated materials | Dhiraj Pal | 1995-03-14 |
| 5193936 | Fixation and stabilization of lead in contaminated soil and solid waste | Dhiraj Pal | 1993-03-16 |