Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559203 | Foundry binder systems containing an alkyl resorcinol and their use | David A. Hutchings, Heimo J. Langer, Ken K. Chang | 2003-05-06 |
| 6017978 | Polyurethane forming no-bake foundry binders | Chia-Hung Chen, Ken K. Chang, Albert L. Haugse | 2000-01-25 |
| 6005021 | No-bake foundry mixes and their uses | Chia-Hung Chen | 1999-12-21 |
| 5908914 | Benzylic ether phenolic resole resins and their uses | William R. Dunnavant, Robert B. Fechter, Heimo J. Langer | 1999-06-01 |
| 5859091 | No-bake foundry mixes and their use | Chia-Hung Chen | 1999-01-12 |
| 5756640 | Process for preparing benzylic ether phenolic resole resins | William R. Dunnavant, Robert B. Fechter, Heimo J. Langer | 1998-05-26 |
| 5739255 | Benzylic ether phenolic resole resins | William R. Dunnavant, Robert B. Fechter, Heimo J. Langer | 1998-04-14 |
| 5612392 | Heat cured foundry binder systems and their uses | Ken K. Chang, A. Leonard Haugse | 1997-03-18 |
| 5457142 | Hot-box foundry mix | Gary W. Strehl | 1995-10-10 |