Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6537516 | Integrated method of preconditioning a resin for hydrogen peroxide purification and purifying hydrogen peroxide | Mary D. Havlicek, Joe G. Hoffman | 2003-03-25 |
| 6372022 | Ionic purifier | Joe G. Hoffman | 2002-04-16 |
| 6214173 | On-site manufacture of ultra-high-purity nitric acid | Mindi Xu, Tracey Jacksier, Hwa-Chi Wang, Joe G. Hoffman, R. Scot Clark | 2001-04-10 |
| 5500096 | Method of concentrating less volatile liquids | — | 1996-03-19 |
| 5443695 | Distillation apparatus for concentrating less volatile liquids | — | 1995-08-22 |
| 5354428 | Apparatus for the continuous on-site chemical reprocessing of ultrapure liquids | R. Scot Clark, Joe G. Hoffman, John B. Davison, David W. Persichini, Bruce A. Lipisko +2 more | 1994-10-11 |
| 5236555 | Apparatus for concentration of liquids | — | 1993-08-17 |
| 5225048 | Method for concentration of liquids | — | 1993-07-06 |
| 5164049 | Method for making ultrapure sulfuric acid | R. Scot Clark, John B. Davison, David W. Persichini, Bruce A. Lipisko, Alan W. Jones +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, 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 |