Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9725645 | Proppant with composite coating | Spyridon Monastiriotis, Robert Ray McDaniel, Ralph Edward Barthel | 2017-08-08 |
| 9624421 | Dual function proppants | Robert Ray McDaniel | 2017-04-18 |
| 9562187 | Manufacture of polymer coated proppants | Robert Ray McDaniel | 2017-02-07 |