Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436681 | Process for producing iron oxide weighting material from iron chloride solutions | Virgil J. Barczak, Haywood A. Perkins | 1984-03-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436681 | Process for producing iron oxide weighting material from iron chloride solutions | Virgil J. Barczak, Haywood A. Perkins | 1984-03-13 |