Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5728202 | Gilsonite modified, natural, hydrocarbon-enriched sand composition | Roy E. Nelson, Kenneth Clark Christensen | 1998-03-17 |
| RE35163 | Water-wettable drilling mud additives containing uintaite | K. Clark Christensen, Neal Davis, II | 1996-02-27 |
| 5378272 | Uintaite-derived toners and printing inks | Enrique E. Romagosa, John F. Cooper, Michael H. Lane | 1995-01-03 |
| 5270359 | Uintaite-derived toners and printing inks | Enrique E. Romagosa, John F. Cooper, Michael H. Lane | 1993-12-14 |
| 5030365 | Water-wettable drilling mud additives containing uintaite | K. Clark Christensen, Neal Davis, II | 1991-07-09 |