Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888116 | Method of improving membrane properties via reaction of diazonium compounds or precursors | Donald L. Schmidt | 1989-12-19 |
| 4834886 | Process for making alkali resistant hyperfiltration membrane and resulting product | — | 1989-05-30 |
| 4824574 | Novel water softening process using membranes | David R. Walker | 1989-04-25 |
| 4812238 | Membranes prepared via reaction of diazonium compounds or precursors | Donald L. Schmidt | 1989-03-14 |
| 4812270 | Novel water softening membranes | David R. Walker | 1989-03-14 |