Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820441 | Process for the preparation of a granular detergent composition | Elfed H. Evans | 1989-04-11 |
| 4818424 | Spray drying of a detergent containing a porus crystal-growth-modified carbonate | Elfed H. Evans | 1989-04-04 |