Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5925743 | Polymerized alkaline lignin materials | — | 1999-07-20 |
| 5663425 | Production of acid soluble humates | Stuart E. Lebo, Jr., Lori L. Bushar | 1997-09-02 |
| 5552149 | Method for microencapsulation of agriculturally active substances | Stuart E. Lebo, Jr. | 1996-09-03 |
| 5446133 | Nitric acid oxidized lignosulfonates | — | 1995-08-29 |
| 5041153 | Lignosulfonate treated fertilizer particles | — | 1991-08-20 |
| 4846871 | Lignosulfonate treated fertilizer particles | — | 1989-07-11 |
| 4846888 | Oil well drilling cement dispersant | — | 1989-07-11 |
| RE32895 | Solubilized lignosulfonate derivatives | Michael E. Sanford | 1989-03-28 |
| 4789391 | Controlled release formulation for fertilizers | — | 1988-12-06 |
| 4756738 | Controlled release formulation for fertilizers | — | 1988-07-12 |
| 4752317 | Controlled release formation for urea | — | 1988-06-21 |
| 4505825 | Oil well drilling clay conditioner | — | 1985-03-19 |
| 4457853 | Oil well drilling clay conditioners and method of their preparation | — | 1984-07-03 |
| 4447339 | Oil well drilling clay conditioners and method of their preparation | — | 1984-05-08 |
| 4384997 | Lignosulfonated derivatives for use in enhanced oil recovery | — | 1983-05-24 |
| RE31190 | Oil well cementing process | Michael E. Sanford, Jiten Chatterji, Charles R. George, Jerry D. Childs, Roosevelt Love | 1983-03-29 |
| 4296813 | Well cementing | Michael E. Sanford | 1981-10-27 |
| 4293342 | Lignosulfonate derivatives | — | 1981-10-06 |
| 4293459 | Asphalt emulsion-conditioner | — | 1981-10-06 |
| 4219471 | Lignosulfonate derivatives | — | 1980-08-26 |
| 4181652 | Ozonated lignosulfonates | — | 1980-01-01 |