Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7229525 | Methods to enhance pulp bleaching and delignification | Prasad Y. Duggirala, Sergey M. Shevchenko | 2007-06-12 |
| 6926832 | Method of using water soluble polymers in a membrane biological reactor | John H. Collins, Deepak A. Musale, Seong-Hoon Yoon, William J. Ward | 2005-08-09 |
| 6872312 | Method of using high molecular weight water soluble polymers in membrane bioreactor systems | Jitendra Shah, John H. Collins | 2005-03-29 |
| 6723245 | Method of using water soluble cationic polymers in membrane biological reactors | John H. Collins | 2004-04-20 |
| 6702921 | Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent | Prasad Y. Duggirala, Sergey M. Shevchenko | 2004-03-09 |
| 6258277 | Composition and method for simultaneously precipitating metal ions from semiconductor wastewater and enhancing microfilter operation | Angela S. Kowalski, E. H. Kelle Zeiher, William J. Ward | 2001-07-10 |
| 6238486 | Detectable cationic flocculant and method of using same in industrial food processes | Andrew J. Dunham, Cathy C. Johnson, John W. Sparapany, Anthony G. Sommese | 2001-05-29 |
| 6140130 | Detection and removal of copper from wastewater streams from semiconductor and printed circuit board processing | Angela S. Kowalski, Brian V. Jenkins, John E. Hoots | 2000-10-31 |
| 5840158 | Colloidal silica/polyelectrolyte blends for pulp and paper applications | Pek L. Choo, Bruce A. Keiser, Michio Kobayashi, Maureen B. Nunn, David Picco | 1998-11-24 |
| 5667697 | Colloidal silica/polyelectrolyte blends for natural water clarification | Pek L. Choo, David Picco, Michio Kobayashi | 1997-09-16 |
| 5620629 | Colloidal silica/polyelectrolyte blends for natural water clarification | Pek L. Choo, David Picco, Michio Kobayashi | 1997-04-15 |
| 5554298 | Steel mill flume water treatment | Ronald D. Kochik, David Picco, Michael L. Braden | 1996-09-10 |