Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6224779 | Inhibition of algae in swimming pools | — | 2001-05-01 |
| 5820760 | Process for reducing nitrous oxide emission from waste water treatment | — | 1998-10-13 |
| 5182021 | Biological process for enhanced removal of ammonia, nitrite, nitrate, and phosphate from wastewater | — | 1993-01-26 |
| 4802905 | Method for protecting plants and plant matter from stress | — | 1989-02-07 |
| 4731185 | Biological wastewater treating system | Michael S. Chen | 1988-03-15 |
| RE32429 | Production of non-bulking activated sludge | — | 1987-06-02 |
| 4650585 | Method for minimizing diurnal swing in phosphorus content of effluent streams from wastewater treating plants | Sun-Nan Hong | 1987-03-17 |
| 4556491 | Avoidance of rising sludge in biological wastewater treatment clarifiers | Sun-Nan Hong, Robert P. Seebohm | 1985-12-03 |
| 4552663 | Process for the removal of ammoniacal nitrogen in the BOD sorption zone of a wastewater treatment plant | Sun-Nan Hong | 1985-11-12 |
| 4488968 | Removal of phosphates and BOD from wastewaters | Sun-Nan Hong | 1984-12-18 |
| 4271026 | Control of activated sludge wastewater treating process for enhanced phosphorous removal | Michael S. Chen, Eugene J. Greskovich | 1981-06-02 |