Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346627 | Method for removing metals from a fluid stream | Pek L. Choo, John W. Sparapany, John H. Collins | 1994-09-13 |
| 5338816 | Hydrophobic polyelectrolytes used in removing color | Manian Ramesh, John W. Sparapany, Martha R. Finck, Chandrashekar S. Shetty | 1994-08-16 |
| 5328599 | System using sulfide ion-selective electrodes for control of chemical feed of organic sulfide products for metal ion precipitation from waste water | Pek L. Choo, Wayne M. Carlson | 1994-07-12 |
| 5283306 | Hydrophobic polyelectrolytes used in removing color | Manian Ramesh, John W. Sparapany, Martha R. Finck, Chandrashekar S. Shetty | 1994-02-01 |