Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853465 | Organophilic polyphenolic acid adducts | Jack C. Cowan, Victor M. Granquist | 1989-08-01 |
| 4843048 | Organophilic clay compositions | Victor M. Granquist, Jack C. Cowan | 1989-06-27 |
| 4737295 | Organophilic polyphenolic acid adducts | Jack C. Cowan, Victor M. Granquist | 1988-04-12 |
| 4686051 | Method of increasing the rate of hydration of activated hydroxyethyl cellulose compositions | Lonnie D. Hoover | 1987-08-11 |
| 4597878 | Polyphenolic acid adducts | Victor M. Granquist | 1986-07-01 |
| 4582614 | Compositions and method for thickening aqueous brines | Lonnie D. Hoover | 1986-04-15 |
| 4569799 | Process for making organophilic humate derivatives | — | 1986-02-11 |
| 4566976 | Viscous heavy brines | Lonnie D. Hoover | 1986-01-28 |
| 4528104 | Oil based packer fluids | Forrest A. Scearce | 1985-07-09 |
| 4496468 | Hydrated hydroxyethyl cellulose compositions | Lonnie D. Hoover | 1985-01-29 |
| 4476032 | Method of increasing the rate of hydration of activated hydroethyl cellulose compositions | Lonnie D. Hoover | 1984-10-09 |
| 4464274 | Organophilic clay suspending agents | — | 1984-08-07 |
| 4459214 | Viscous heavy brines | Lonnie D. Hoover | 1984-07-10 |
| 4439333 | Heavy brine viscosifiers | Lonnie D. Hoover | 1984-03-27 |
| 4435217 | Concentrated hydrophilic polymer suspensions | — | 1984-03-06 |
| 4435309 | Method of liquifying waxy materials | — | 1984-03-06 |
| 4435564 | Compositions and processes for using hydroxyethyl cellulose in heavy brines | — | 1984-03-06 |
| 4427556 | Dispersible hydrophilic polymer compositions | Lonnie D. Hoover | 1984-01-24 |
| 4425244 | Organophilic clay gellants | — | 1984-01-10 |
| 4420406 | Thickened heavy brines | Lonnie D. Hoover | 1983-12-13 |
| 4392964 | Compositions and method for thickening aqueous brines | Lonnie D. Hoover | 1983-07-12 |
| 4382868 | Organophilic clay gellants | — | 1983-05-10 |
| 4269279 | Spheroidal plastic coated magnetizable particles and their use in drilling fluids | — | 1981-05-26 |