Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4663051 | Regeneration of mixed bed demineralizers | Douglas S. Johnstone | 1987-05-05 |
| 4609462 | Method and apparatus to convert top tube sheet filter to bottom tube sheet filter | — | 1986-09-02 |
| 4564455 | Three component resin system and method for purifying aqueous solutions | Eli Salem, Robert Kunin | 1986-01-14 |
| 4405466 | Backwash method and apparatus | Joseph F. Giannelli, Leo F. Ryan | 1983-09-20 |