Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5411643 | Integrated process of using chloric acid to separate zinc oxide and manganese oxide | David W. Cawlfield | 1995-05-02 |
| 5401477 | Process for producing solid manganese dioxide | David W. Cawlfield | 1995-03-28 |
| 5279743 | Process of using chloric acid to separate zinc oxide and manganese oxide | David W. Cawlfield | 1994-01-18 |
| 5223617 | Process for producing chloroisocyanurate compounds with concentrated salt-free hypochlorous acid | Wayne H. Hammond, John H. Shaffer, John A. Wojtowicz, Joseph Borcz | 1993-06-29 |