Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11795376 | Viscosifying friction reducers | Genyao Lin, Louis Villafane, Kailas B. Sawant, Shih-Ruey T. Chen | 2023-10-24 |
| 11746277 | Diluted cationic friction reducers | Kailas B. Sawant, Louis Villafane, Shih-Ruey T. Chen, Randy Loeffler | 2023-09-05 |
| 11261361 | Salt tolerant friction reducer | Shih-Ruey T. Chen, Randy Loeffler | 2022-03-01 |
| 11162011 | Diluted cationic friction reducers | Kailas B. Sawant, Louis Villafane, Shih-Ruey T. Chen, Randy Loeffler | 2021-11-02 |
| 10711173 | Salt tolerant friction reducer | Shih-Ruey T. Chen, Randy Loeffler, Kailas B. Sawant | 2020-07-14 |
| 10584277 | Water-in-oil emulsion composition and method of treating subterranean formation using same | Shih-Ruey T. Chen | 2020-03-10 |
| 10385253 | Salt tolerant friction reducer | Shih-Ruey T. Chen, Randy Loeffler, 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 |
| 8640774 | Method of treating a formation | Shih-Ruey T. Chen | 2014-02-04 |
| 8535651 | Water soluble polymer complexes with surfactants | Shih-Ruey T. Chen | 2013-09-17 |
| 8211414 | Water soluble polymer complexes with surfactants | Shih-Ruey T. Chen | 2012-07-03 |
| 8021516 | Use of water-soluble polymer complexes in aqueous systems | Shih-Ruey T. Chen, Valentino L. DeVito | 2011-09-20 |
| 7754794 | Methods of treating keratin based substrates | Shih-Ruey T. Chen, Valentino L. DeVito | 2010-07-13 |
| 7514007 | Use of water-soluble polymer complexes in aqueous systems | Shih-Ruey T. Chen, Valentino L. DeVito | 2009-04-07 |
| 7087556 | Compositions for treating subterranean zones penetrated by well bores | Shih-Ruey T. Chen, Jiten Chatterji, Valentino L. DeVito, Randy Loeffler, Kevin Smith | 2006-08-08 |
| 7001953 | Water-soluble polymer complexes | Shih-Ruey T. Chen, Valentino L. DeVito | 2006-02-21 |
| 6939536 | Cosmetic compositions containing water-soluble polymer complexes | Shih-Ruey T. Chen, Valentino L. DeVito | 2005-09-06 |
| 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 |
| 6414080 | Inverse emulsion polymer and production thereof | Randy Loeffler, Shih-Ruey T. Chen, James Rak | 2002-07-02 |
| 6110995 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Randy Loeffler | 2000-08-29 |
| 5589525 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Randy Loeffler | 1996-12-31 |
| 5480921 | Process for preparing novel high solids non-aqueous polymer compositions | Wood E. Hunter, Randy Loeffler | 1996-01-02 |