Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5156767 | Emulsion breaking using alkylphenol-polyethylene oxide-acrylate polymer coated coalescer material | Patrick H. Fitzgerald, Nicholas O. Wolf, Charles R. Clark | 1992-10-20 |
| 4986353 | Placement process for oil field chemicals | Charles R. Clark, Donald L. Whitfill, Edward Francis McBride, Harold E. Bellis | 1991-01-22 |
| 4986355 | Process for the preparation of fluid loss additive and gel breaker | Burton M. Casad, Charles R. Clark, Lisa A. Cantu, Edward Francis McBride | 1991-01-22 |