Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855424 | Phenothiazine derivatives | Raymond C. De Wald | 1989-08-08 |
| 4853446 | Phenothiazine composition for use in reactor scale prevention | Raymond C. DeWald | 1989-08-01 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855424 | Phenothiazine derivatives | Raymond C. De Wald | 1989-08-08 |
| 4853446 | Phenothiazine composition for use in reactor scale prevention | Raymond C. DeWald | 1989-08-01 |