Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6488763 | Light weight high temperature well cement compositions and methods | Lance E. Brothers, Barry Ekstrand, D. Chad Brenneis, Jerry D. Childs | 2002-12-03 |
| 6332921 | Cement compositions and methods for high temperature wells containing carbon dioxide | Lance E. Brothers, Barry Ekstrand, D. Chad Brenneis, Jerry D. Childs | 2001-12-25 |
| 6143069 | Light weight high temperature well cement compositions and methods | Lance E. Brothers, Barry Ekstrand, D. Chad Brenneis, Jerry D. Childs | 2000-11-07 |