Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835195 | Dry ground/wet ground calcium carbonate filler compositions | Jerry W. Rayfield, Robert A. Baker | 1989-05-30 |
| 4820347 | Beneficiated talcs | — | 1989-04-11 |
| 4814019 | Beneficiated talcs | — | 1989-03-21 |