Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039433 | Method of using polymers of amido-sulfonic acid containing monomers and salts as drilling additive | Thomas M. Sopko | 1991-08-13 |
| 4812544 | Method of producing polymers of amido-sulfonic acid monomers with high energy agitators | Thomas M. Sopko | 1989-03-14 |