Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D980717 | Bulk bag | Ricardo Hurtado, Qizhong Diao | 2023-03-14 |
| 8999898 | Drilling fluid additive for loss circulation and wellbore strengthening | Changjun Zhou, David J. Derwin | 2015-04-07 |
| 8617309 | Cement compositions including resilient graphitic carbon fraction | Peter R. Carney, Craig Allen Baer, David J. Derwin, Changjun Zhou, Marcin Tlustochowicz | 2013-12-31 |
| 7666469 | Method of making graphite-coated particulate materials | Donald J. Weintritt, Peter L. Zaleski, Henry Francois | 2010-02-23 |
| 7402338 | Graphite-coated particulate materials | Donald J. Weintritt, Peter L. Zaleski, Henry Francois | 2008-07-22 |
| 6476099 | Joint compound additive for reduction of cracking, cratering and shrinkage | Scott D. Cimaglio, Charles J. Miller | 2002-11-05 |