Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11407689 | Black urea enhanced efficiency controllable release fertilizer compositions | Richard Hartmann, Jr. | 2022-08-09 |
| 7785388 | Method for producing stabilized nitrogen compositions | Richard Hartmann, Jr., Timothy G. Holt | 2010-08-31 |
| 6576035 | Stabilized enhanced efficiency controllable release calcium cyanamide compositions | Richard Hartmann, Jr., Timothy G. Holt | 2003-06-10 |
| 5938813 | Granular coated particles containing urea and metal nitrate, and process for making the same | Patricio L. Araya, Armin Lauterbach, Jubitza K. Reyes, A. Michael Huey, James T. Stafford +1 more | 1999-08-17 |