Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11098221 | Additives for improving DRA injection | Ray L. Johnston, Zhiyi Bao, Richard D. Thomas | 2021-08-24 |
| 11028210 | Core-shell flow improver | Wayne R. Dreher, Kenneth W. Smith, Stuart N. Milligan, William F. Harris, Ray L. Johnston +3 more | 2021-06-08 |