Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6565803 | Method for the inactivation of cryptosporidium parvum using ultraviolet light | James R. Bolton, R. D. Samuel Stevens | 2003-05-20 |
| 5466378 | Oxidized activated carbon for the control of pH and alkalinity in water treatment applications | Richard W. Farmer, Richard A. Hayden | 1995-11-14 |
| 5368738 | Oxidized activated carbon for the control of pH and alkalinity in water treatment applications | Richard A. Hayden | 1994-11-29 |
| 5368739 | Activated carbon oxidized by air at near ambient temperatures for the control of ph and in water treatment applications | Richard A. Hayden, John R. Lutchko, Kishio Yoshino, Satoru Hisaki, Fujito Ehara | 1994-11-29 |