Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4273700 | Polyol resin binder compositions and process | — | 1981-06-16 |
| 4220578 | Method, resin and catalyst for increasing the tensile strength and core hardness of a sand mold or core | Patrick H. Stewart | 1980-09-02 |
| 4215012 | Catalyst for increasing the tensile strength and core hardness of a sand mold or core | Patrick H. Stewart | 1980-07-29 |