Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4660640 | Polysilicate esters for oil reservoir permeability control | Louis D. Rollmann | 1987-04-28 |
| 4619773 | High temperature stable aqueous brine fluids viscosified by water-soluble copolymers of acrylamidomethylpropanesulfonic acid salts | Israel J. Heilweil | 1986-10-28 |
| 4603009 | Process for preparing brine tolerant sulfonate and sulfate surfactants having 1,3-dihydrocarboxy-2-propyl hydrophobic tails | — | 1986-07-29 |
| 4590996 | Use of polyalkoxy sulfonate surfactants for inhibition of scale formation | L. Deane Rollmann, Gerald L. Shoemaker, Kirk D. Schmitt | 1986-05-27 |
| 4515701 | Low cost, brine tolerant sulfonate and sulfate surfactants having 1,3-dihydrocarboxy-2-propyl hydrophobic tails | — | 1985-05-07 |
| 4446079 | Low cost, brine tolerant sulfonate and sulfate surfactants having 1,3-dihydrocarboxy-2-propyl hydrophobic tails | — | 1984-05-01 |