Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6050283 | System and method for on-site mixing of ultra-high-purity chemicals for semiconductor processing | Joe G. Hoffman, R. Scot Clark | 2000-04-18 |
| 5164049 | Method for making ultrapure sulfuric acid | R. Scot Clark, John B. Davison, David W. Persichini, Wallace I. Yuan, Bruce A. Lipisko +2 more | 1992-11-17 |
| 4855023 | Method and apparatus for the continuous on-site chemical reprocessing of ultrapure liquids used in semiconductor wafer cleaning | R. Scot Clark, Joe G. Hoffman, John B. Davison, Alan W. Jones, David W. Persichini +2 more | 1989-08-08 |
| 4828660 | Method and apparatus for the continuous on-site chemical reprocessing of ultrapure liquids | R. Scot Clark, Joe G. Hoffman, John B. Davison, Alan W. Jones, David W. Persichini +2 more | 1989-05-09 |