Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4308048 | Production of ammonium potassium polyphosphates | Richard C. Sheridan, Leland L. Frederick | 1981-12-29 |
| 4239739 | Manufacture of purified diammonium phosphate | Richard C. Sheridan | 1980-12-16 |
| 4238459 | Chemical beneficiation of phosphatic limestone and phosphate rock with .alpha.-hydroxysulfonic acids | John F. Phillips, Guerry H. McClellan | 1980-12-09 |
| 4236911 | Purification and conversion of phosphoric acid to ammonium phosphates | — | 1980-12-02 |
| 4217128 | Production of urea-ammonium polyphosphates from urea phosphate | John M. Stinson, Horace C. Mann, Jr. | 1980-08-12 |
| T996001 | Production of ammonium potassium polyphosphates | Richard C. Sheridan, Leland L. Frederick | 1980-07-01 |