Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5964987 | Neutral oil removal from natural cresylic acid mixtures | David H. Duncan, Dana J. Maas, Kevin M. Mohl, Alfred K. Kuhn | 1999-10-12 |
| 5750009 | Method for purifying natural cresylic acid mixtures | David H. Duncan, Alfred K. Kuhn, Dana J. Maas, Kevin M. Mohl | 1998-05-12 |
| 5679223 | Method for separating and purifying catechol mixtures | David H. Duncan, Dana J. Maas, Kevin M. Mohl, Alfred K. Kuhn | 1997-10-21 |
| 5370387 | Golf ball/fluorescent object locator | — | 1994-12-06 |
| 5354429 | Natural cresylic acid processing | David H. Duncan, Dana J. Maas, Kevin M. Mohl, Robert G. Todd | 1994-10-11 |
| 4337142 | Continuous process for conversion of coal | Curtis L. Knudson, Warrack G. Willson, Everett A. Sondreal, Sylvia A. Farnum | 1982-06-29 |