Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9630867 | Treatment of spent caustic waste | Bryan J. Kumfer, Chad L. Felch, Richard W. Lehmann | 2017-04-25 |
| 8734648 | Treatment of spent caustic waste | Bryan J. Kumfer, Chad L. Felch, Richard W. Lehmann | 2014-05-27 |
| 8114297 | Wet oxidation of soot | Chad L. Felch, Philip Rettger, Bryan J. Kumfer, Curtis D. Cooley, Timothy Schleusner +1 more | 2012-02-14 |
| 7850822 | System and method of wet oxidation of a viscose process stream | Chad L. Felch, Richard W. Lehmann, Todd Wingers, William M. Copa | 2010-12-14 |
| 5340473 | Gas/liquid mixing apparatus | Russell D. Roberts, Claude E. Ellis | 1994-08-23 |
| 5262060 | Wet oxidation of ammonium salt containing liquors | Richard W. Lehmann | 1993-11-16 |
| 5234607 | Wet oxidation system startup process | Richard W. Lehmann, Gene W. Mueller, Kenneth P. Keckler | 1993-08-10 |
| 5192453 | Wet oxidation process for ACN waste streams | Kenneth P. Keckler, Joseph A. Momont, Richard W. Lehmann | 1993-03-09 |
| 5057231 | Method for starting up and controlling operating temperature of a wet oxidation process | Gene W. Mueller | 1991-10-15 |
| 4812243 | Process for treating caustic cyanide metal wastes | Curtis D. Cooley, Claude E. Ellis | 1989-03-14 |
| 4387084 | Process for treating thiosulfate containing liquors | Gerald L. Bauer | 1983-06-07 |
| 4372940 | Process and apparatus for treatment of thiosulfate containing liquors | Gerald L. Bauer | 1983-02-08 |