Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333513 | Catechol resins for the shell process | — | 1982-06-08 |
| 4281090 | Catechol resins for the shell process | — | 1981-07-28 |
| 4216133 | Shell process foundry resin compositions | Calvin K. Johnson | 1980-08-05 |
| 4206262 | Catechol resins for the shell process | — | 1980-06-03 |