Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5354428 | Apparatus for the continuous on-site chemical reprocessing of ultrapure liquids | R. Scot Clark, Joe G. Hoffman, John B. Davison, David W. Persichini, Wallace I. Yuan +2 more | 1994-10-11 |
| 5164049 | Method for making ultrapure sulfuric acid | R. Scot Clark, John B. Davison, David W. Persichini, Wallace I. Yuan, Alan W. Jones +2 more | 1992-11-17 |
| 4979643 | Chemical refill system | John C. Schumacher, Richard E. Howard, Peter T. Randke, Adrian Sandu, Robert E. Fletcher +1 more | 1990-12-25 |
| 4859375 | Chemical refill system | John C. Schumacher, Richard E. Howard, Peter T. Randtke, Adrian Sandu, Robert E. Fletcher +1 more | 1989-08-22 |
| 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, Allen H. Jones, Jr. +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, Allen H. Jones, Jr. +2 more | 1989-05-09 |