Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11746277 | Diluted cationic friction reducers | Kailas B. Sawant, Louis Villafane, Kevin W. Frederick, Shih-Ruey T. Chen | 2023-09-05 |
| 11261361 | Salt tolerant friction reducer | Kevin W. Frederick, Shih-Ruey T. Chen | 2022-03-01 |
| 11162011 | Diluted cationic friction reducers | Kailas B. Sawant, Louis Villafane, Kevin W. Frederick, Shih-Ruey T. Chen | 2021-11-02 |
| 10711173 | Salt tolerant friction reducer | Kevin W. Frederick, Shih-Ruey T. Chen, Kailas B. Sawant | 2020-07-14 |
| 10385253 | Salt tolerant friction reducer | Kevin W. Frederick, Shih-Ruey T. Chen, Kailas B. Sawant | 2019-08-20 |
| 9816022 | Ampholyte polymeric compounds in subterranean applications | HsinChen Chung, Yuntao Thomas Hu, Xiangnan Ye, Narongsak Tonmukayakul, Michael A. McCabe +2 more | 2017-11-14 |
| 9695350 | Ampholyte polymeric compounds in subterranean applications | HsinChen Chung, Yuntao Thomas Hu, Xiangnan Ye, Narongsak Tonmukayakul, Michael A. McCabe +2 more | 2017-07-04 |
| 7087556 | Compositions for treating subterranean zones penetrated by well bores | Shih-Ruey T. Chen, Jiten Chatterji, Valentino L. DeVito, Kevin W. Frederick, Kevin Smith | 2006-08-08 |
| 6767867 | Methods of treating subterranean zones penetrated by well bores | Jiten Chatterji, Roger S. Cromwell, Bobby J. King, D. Chad Brenneis, Dennis W. Gray +5 more | 2004-07-27 |
| 6691715 | Water soluble polymer composition and method of use | Gary F. Matz, Shih-Ruey T. Chen, Allan L. Melby, Nicholas F. Vozza | 2004-02-17 |
| 6414080 | Inverse emulsion polymer and production thereof | Shih-Ruey T. Chen, Kevin W. Frederick, James Rak | 2002-07-02 |
| 6110995 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Kevin W. Frederick | 2000-08-29 |
| 5589525 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Kevin W. Frederick | 1996-12-31 |
| 5480921 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Kevin W. Frederick | 1996-01-02 |