Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954155 | Sonic gelling of clay in suspension fertilizers | Robert G. H. Lee | 1990-09-04 |
| 4885021 | Particulate urea with clay incorporated for hardness and/or gelling | — | 1989-12-05 |