Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5964987 | Neutral oil removal from natural cresylic acid mixtures | David H. Duncan, Gene G. Baker, Dana J. Maas, Alfred K. Kuhn | 1999-10-12 |
| 5750009 | Method for purifying natural cresylic acid mixtures | David H. Duncan, Gene G. Baker, Alfred K. Kuhn, Dana J. Maas | 1998-05-12 |
| 5679223 | Method for separating and purifying catechol mixtures | David H. Duncan, Gene G. Baker, Dana J. Maas, Alfred K. Kuhn | 1997-10-21 |
| 5354429 | Natural cresylic acid processing | David H. Duncan, Gene G. Baker, Dana J. Maas, Robert G. Todd | 1994-10-11 |