Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362464 | Method for removing sulfur oxides | J. Stuart Burgess, Donald R. Spink | 1994-11-08 |
| 5023064 | Method for removing sulfur oxide | J. Stuart Burgess, Donald R. Spink | 1991-06-11 |
| 4963329 | Gas reacting apparatus and method | J. Stuart Burgess, Donald R. Spink | 1990-10-16 |
| 4889694 | Recovery of zinc values from zinc and iron-bearing sulfide materials | Donald R. Spink | 1989-12-26 |
| 4865817 | Gas reacting apparatus | J. Stuart Burgess, Donald R. Spink | 1989-09-12 |
| 4778520 | Process for leaching zinc from partially desulfurized zinc concentrates by sulfuric acid | Donald R. Spink | 1988-10-18 |