Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4978461 | Low and high temperature drilling fluids based on sulfonated terpolymer ionomers | Dennis G. Peiffer, Robert D. Lundberg, John C. Newlove | 1990-12-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4978461 | Low and high temperature drilling fluids based on sulfonated terpolymer ionomers | Dennis G. Peiffer, Robert D. Lundberg, John C. Newlove | 1990-12-18 |