Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7459083 | Method for controlling fouling of a membrane filter | Hong Zhao, Richard W. DiMassimo | 2008-12-02 |
| 7147778 | Method and system for nitrifying and denitrifying wastewater | Richard W. DiMassimo, Hong Zhao, Luther G. Wood | 2006-12-12 |
| 7001516 | Process for removing phosphorus from wastewater utilizing a triple basin wastewater treatment system | Hong Zhao, Richard W. DiMassimo | 2006-02-21 |
| 6685834 | Method for conditioning and dewatering thermophilic aerobically digested biosolids | Sudhir N. Murthy, R. David Holbrook, John T. Novak | 2004-02-03 |
| 5650069 | Dual-stage biological process for removing nitrogen from wastewater | Finn Nielsen, O. Roy Langslet | 1997-07-22 |
| 4650585 | Method for minimizing diurnal swing in phosphorus content of effluent streams from wastewater treating plants | Marshall L. Spector | 1987-03-17 |
| 4556491 | Avoidance of rising sludge in biological wastewater treatment clarifiers | Marshall L. Spector, Robert P. Seebohm | 1985-12-03 |
| 4552663 | Process for the removal of ammoniacal nitrogen in the BOD sorption zone of a wastewater treatment plant | Marshall L. Spector | 1985-11-12 |
| 4488967 | Treatment of wastewater containing phosphorus compounds | Charles Block | 1984-12-18 |
| 4488968 | Removal of phosphates and BOD from wastewaters | Marshall L. Spector | 1984-12-18 |