Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879043 | Manufacture of high purity hydrogen peroxide by using reverse osmosis osmosis | John H. Boughton, Ralph A. Butz, Herman C. T. Cheng, Brian T. Hannon, Janet Weigel | 1989-11-07 |