Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9902626 | Method and filter for removing nitrate ions | Hongchen Dong, Larry Neil Lewis | 2018-02-27 |
| 9371408 | Polymer and method for using the same | Yangang Liang, Wenqing Peng, Xiaoan Xie, Shengxia Liu, Hongchen Dong +4 more | 2016-06-21 |
| 8858803 | Methods of preparing novel halide anion free quaternary ammonium salt monomers, polymerization methods therefor, and methods of use of the resulting polymers | Tamaz Guliashvili | 2014-10-14 |
| 8778185 | Methods of conditioning mixed liquor using water soluble quaternary ammonium starches | Sijing Wang | 2014-07-15 |
| 8728326 | Polymer and methods for preparing and using the same | Wenqing Peng, Yangang Liang, Shengxia Liu, Larry Neil Lewis, Robert James Perry +2 more | 2014-05-20 |
| 8557125 | Treatment additives, methods for making and methods for clarifying aqueous media | Seethalakshmi Suresh, Narain Madhavan, Baraka Kawawa | 2013-10-15 |
| 8518267 | Treatment of surfactant laden wastewater | Matthew David Mersch, James Quentin Pollett | 2013-08-27 |
| 7943048 | Methods for recovering tallow from wastewater | Abdul Rafi Khwaja | 2011-05-17 |
| 7722841 | Polymeric chelant and coagulant to treat metal-containing wastewater | Baraka Kawawa, William S. Carey, Nicholas R. Blandford | 2010-05-25 |
| 7611632 | Method of conditioning mixed liquor using a tannin containing polymer | Sijing Wang, Jianqiu Wang | 2009-11-03 |
| 7291273 | Methods for removing metals from plating operation | Nicholas R. Blandford | 2007-11-06 |
| 6887935 | Modified polymeric flocculants with improved performance characteristics | Jeffrey H. Peltier, Michael R. Wood | 2005-05-03 |
| 6743421 | Method for odor control | Terry Robbins | 2004-06-01 |
| 6666975 | Method of reducing hydrogen sulfide odor emissions from an aqueous medium | Zhuo Chen | 2003-12-23 |
| 5846436 | Composition and method for water clarification | Jen-Chi Chen, Fu Chen, Gerald C. Walterick, Jr. | 1998-12-08 |
| 5720887 | Methods for sludge dewatering | Michael R. Wood, Kimberly A. Bell | 1998-02-24 |
| 5643462 | Composition and method for water clarification | Jen-Chi Chen, Fu Chen, Gerald C. Walterick, Jr. | 1997-07-01 |
| 5486296 | Detoxification for quaternary ammonium compounds with lignosulfonates | Joseph C. Petrille, III, Michael W. Werner | 1996-01-23 |
| 5368744 | Methods for treating wastewater | Michael R. Wood | 1994-11-29 |
| 5292441 | Quaternized polyvinylamine water clarification agents | Jen-Chi Chen, Gerald C. Walterick, Jr., Fu Chen | 1994-03-08 |
| 5234604 | Water soluble block copolymers and methods of use therof | Wen P. Liao, Fu Chen | 1993-08-10 |
| 5183576 | Cationic polymers for sludge dewatering | Michael R. Wood, Keith A. Bair, Fu Chen | 1993-02-02 |
| 5183575 | Methods for the flocculation of coal fines and insoluble metals in coal mine waters | P. Douglas Boyce, Larry Paul Smith | 1993-02-02 |
| 5182331 | Water soluble block copolymers and methods of use thereof | Wen P. Liao, Fu Chen | 1993-01-26 |
| 5169536 | Detoxification agents for surfactant based biocides | Larry A. Lyons, Michael F. Mohn | 1992-12-08 |