Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8894819 | In-line drainer with shaped screen slots | Jeffrey Lawrence Gazdik | 2014-11-25 |
| 8888958 | Pressure diffuser with an annular baffle screen plate over water inlet | Grant Bechard, Keith Vogel, Edward James Cummings, Carl Luhrmann | 2014-11-18 |
| 7799173 | Screen plates having diagonal slots with curved inlets for a digester | Carl Luhrmann | 2010-09-21 |
| RE39208 | Method of treating material in a continuous digester | Joseph R. Phillips, Jerry R. Johanson, John Pietrangelo | 2006-08-01 |
| 6375796 | Method of treating material in a continuous digester | Joseph R. Phillips, Jerry R. Johanson, John Pietrangelo | 2002-04-23 |
| 6280569 | Compression rings for column relief in continuous cooking vessels | — | 2001-08-28 |
| 6129816 | Tapered screen assembly for a cellulose pulp digester | Joseph R. Phillips, Jerry R. Johanson, John Pietrangelo | 2000-10-10 |