Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867613 | Treatment of inorganic particles with polymer | Gloria McLeod | 1989-09-19 |
| 4820424 | Products and processes for the flocculation of aqueous suspensions | John R. Field | 1989-04-11 |