Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863891 | Catalyst for the manufacture of acrylonitrile and methacrylonitrile | Robert K. Grasselli, Harley F. Hardman | 1989-09-05 |
| 4824063 | Drying board | — | 1989-04-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863891 | Catalyst for the manufacture of acrylonitrile and methacrylonitrile | Robert K. Grasselli, Harley F. Hardman | 1989-09-05 |
| 4824063 | Drying board | — | 1989-04-25 |