Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8557125 | Treatment additives, methods for making and methods for clarifying aqueous media | Seethalakshmi Suresh, Stephen R. Vasconcellos, Narain Madhavan | 2013-10-15 |
| 7998351 | Tannin based polymeric coagulants composition and method of use | Vinod Kumar Rai, Ashok Shyadligeri, Abdul Rafi Khwaja, Narain Madhavan | 2011-08-16 |
| 7722841 | Polymeric chelant and coagulant to treat metal-containing wastewater | Stephen R. Vasconcellos, William S. Carey, Nicholas R. Blandford | 2010-05-25 |
| 6417268 | Method for making hydrophobically associative polymers, methods of use and compositions | Huashi Zhang, Fu Chen | 2002-07-09 |