Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5957203 | Ultra-high temperature stable gels | Richard D. Hutchins, Burton B. Sandiford | 1999-09-28 |
| 5762141 | Ultra-high temperature stable gels | Richard D. Hutchins, Burton B. Sandiford | 1998-06-09 |
| 5617920 | Method for modifying gelation time of organically crosslinked, aqueous gels | Burton B. Sandiford, Richard D. Hutchins | 1997-04-08 |
| 5486312 | High temperature stable gels | Burton B. Sandiford, Richard D. Hutchins | 1996-01-23 |
| 5418217 | Composition for selectively reducing subterranean formation permeability | Richard D. Hutchins | 1995-05-23 |
| 5335733 | Method for delaying gelation of a gelable polymer composition injected into a subterranean formation | Burton B. Sandiford, Richard D. Hutchins | 1994-08-09 |
| 5291949 | Method for inhibiting caustic flood breakthrough | Richard D. Hutchins | 1994-03-08 |
| 5268112 | Gel-forming composition | Richard D. Hutchins, Burton B. Sandiford | 1993-12-07 |
| 5263540 | Crosslinked hydroxyethylcellulose and its uses | Richard D. Hutchins | 1993-11-23 |
| 5246073 | High temperature stable gels | Burton B. Sandiford, Richard D. Hutchins | 1993-09-21 |
| 5244042 | Lanthanide-crosslinked polymers for subterranean injection | Richard D. Hutchins | 1993-09-14 |
| 5226480 | Recovery system containing lanthanide-crosslinked polymers | Richard D. Hutchins | 1993-07-13 |
| 5225090 | Visible gels prepared using stainless steel as a crosslinking agent | Richard D. Hutchins | 1993-07-06 |
| 5213446 | Drilling mud disposal technique | — | 1993-05-25 |
| 5211858 | Lanthanide-crosslinked polymers for subterranean fluid containment | Richard D. Hutchins | 1993-05-18 |
| 5207934 | Crosslinked hydroxyethylcellulose and its uses | Richard D. Hutchins | 1993-05-04 |
| 5203834 | Foamed gels having selective permeability | Richard D. Hutchins, Burton B. Sandiford | 1993-04-20 |
| 5145012 | Method for selectively reducing subterranean water permeability | Richard D. Hutchins, Burton B. Sandiford | 1992-09-08 |
| 5139087 | Method for ensuring injectivity of polymer solutions | Richard D. Hutchins | 1992-08-18 |
| 5125456 | Composition for selectively reducing subterranean formation permeability | Richard D. Hutchins | 1992-06-30 |
| 5111886 | Crosslinked hydroxyethylcellulose and its uses | Richard D. Hutchins | 1992-05-12 |
| 4783492 | Continuous permeability reduction in subterranean reservoirs | Richard D. Hutchins | 1988-11-08 |
| 4694906 | Method for emplacement of a gelatinous foam in gas flooding enhanced recovery | Richard D. Hutchins | 1987-09-22 |
| 4534412 | Continuous permeability reduction in subterranean reservoirs | Richard D. Hutchins | 1985-08-13 |
| 4413680 | Permeability reduction in subterranean reservoirs | Burton B. Sandiford, Richard D. Hutchins | 1983-11-08 |