Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5281644 | Ambient temperature hardening binder compositions | David R. Armbruster, Arthur H. Gerber | 1994-01-25 |
| 5238976 | Process to enhance the tensile strength of reclaimed sand bonded with ester cured alkaline phenolic resin | — | 1993-08-24 |
| 5234973 | Compositions for foundry molding processes utilizing reclaimed sand | Calvin K. Johnson, Richard Cooke | 1993-08-10 |
| 5190993 | Process to enhance the tensile strength of reclaimed sand bonded with ester cured alkaline phenolic resin using an aminosilane solution | — | 1993-03-02 |
| 5089540 | Processes and compositions to enhance the tensile strength of reclaimed sand bonded with alkaline resins | David R. Armbruster, Merlyn C. Pasion | 1992-02-18 |
| 5082876 | Compositions for foundry molding processes utilizing reclaimed sand | Calvin K. Johnson, Richard Cooke | 1992-01-21 |
| 5036116 | Ester hardeners for phenolic resin binder systems | Sudhir K. Trikha | 1991-07-30 |
| 4988745 | Ester hardeners for phenolic resin binder systems | Sudhir K. Trikha | 1991-01-29 |