Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5659002 | Modified tannin mannich polymers | Martha R. Finck | 1997-08-19 |
| 5597448 | Method for reducing pitch deposition using copolymer of N-vinyl acetamide | Carol S. Greer | 1997-01-28 |