Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11472726 | Sequencing batch reactor systems and methods | Nicholas A. Barczewski, Patrick T. Kelly | 2022-10-18 |
| 11352277 | VacFlush adaptor for submersible pumps | — | 2022-06-07 |
| 6383389 | Wastewater treatment system and method of control | Susan Pilgram, Reza Shamskhorzani | 2002-05-07 |
| 5885448 | Thermophilic aerobic waste treatment process | Yanlong Li | 1999-03-23 |
| 5656155 | Thermophilic aerobic waste treatment system | Yanlong Li | 1997-08-12 |
| 5599450 | Anaerobic upflow batch reactor | Yanlong Li | 1997-02-04 |
| 5587081 | Thermophilic aerobic waste treatment process | Yanlong Li | 1996-12-24 |
| 5421995 | Sludge blanket level detector suspended from floating decanter | — | 1995-06-06 |
| 5110510 | Aeration and mixing apparatus | — | 1992-05-05 |
| 5106494 | Decanter assembly | — | 1992-04-21 |
| 5039404 | Oxygen permeable membrane used in wastewater treatment | — | 1991-08-13 |
| 5036882 | Valve assembly for decanter for wastewater treatment facility | Dennis L. Nelson, Aaron Willis, James E. Augustyn | 1991-08-06 |
| 4775467 | Reactor piping with pump column | Glen R. Calltharp, Dennis L. Nelson | 1988-10-04 |
| 4724073 | Reactor piping and flow control system | Glen R. Calltharp, Dennis L. Nelson | 1988-02-09 |
| 4711716 | Decanting apparatus | Glen R. Calltharp, Dennis L. Nelson | 1987-12-08 |
| 4648967 | Decanting apparatus | Glen R. Calltharp, Dennis L. Nelson | 1987-03-10 |
| 4645592 | Reactor piping and flow control system | Glen R. Calltharp, Dennis L. Nelson | 1987-02-24 |