Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4650520 | Slurry for cementing, especially cementing of lining pipes in drill holes, and method for production of such a slurry | Hans Konrad Johnsen | 1987-03-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4650520 | Slurry for cementing, especially cementing of lining pipes in drill holes, and method for production of such a slurry | Hans Konrad Johnsen | 1987-03-17 |