Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39208 | Method of treating material in a continuous digester | Jay Sheerer, Jerry R. Johanson, John Pietrangelo | 2006-08-01 |
| 6649068 | Filtration of pulp mill liquids | — | 2003-11-18 |
| 6576084 | Method of pretreating pulp with yield or strength-enhancing additive | C. Bertil Stromberg | 2003-06-10 |
| 6569289 | Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali | C. Bertil Stromberg | 2003-05-27 |
| 6375796 | Method of treating material in a continuous digester | Jay Sheerer, Jerry R. Johanson, John Pietrangelo | 2002-04-23 |
| 6346167 | Dissolved solids control in pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 2002-02-12 |
| 6280568 | Dissolved organic material control in a cellulose pulp continuous digester | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 2001-08-28 |
| 6159337 | Dissolved organic materials control in cellulose pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 2000-12-12 |
| 6153300 | Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals | C. Bertil Stromberg, Patrick Sharpe, Louis O. Torregrossa | 2000-11-28 |
| 6129816 | Tapered screen assembly for a cellulose pulp digester | Jay Sheerer, Jerry R. Johanson, John Pietrangelo | 2000-10-10 |
| 6086712 | DOM control in cellulose pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 2000-07-11 |
| 5985096 | Vertical pulping digester having substantially constant diameter | Bruno Marcoccia, J. Robert Prough, Jerry R. Johanson, C. Bertil Stromberg | 1999-11-16 |
| 5865948 | Method for steaming comminuted cellulosic fibrous material during continuous solvent pulping | Jairo H. Lora, John Patrick Maley, Brian F. Greenwood, David J. Lebel | 1999-02-02 |
| 5849150 | Low dissolved solids control in pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 1998-12-15 |
| 5681427 | Apparatus for treating pulp produced by solvent pulping | Jairo H. Lora, John Patrick Maley, Brian F. Greenwood, David J. Lebel | 1997-10-28 |
| 5662790 | Air contactor with foam separation vessel system | Keith Carlton, Scott M. Clum, Todd A. Salvato | 1997-09-02 |
| 5620562 | Dissolved solids control in pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 1997-04-15 |
| 5567279 | Variable stage pressure diffuser | John Weston, Victor L. Bilodeau, Ronald Bain, Mark D. Barrett, Brian F. Greenwood +1 more | 1996-10-22 |
| 5567262 | Two stage pressure diffuser | John Weston | 1996-10-22 |
| 5549788 | Minimal effluents discharge pulp mill with chemical recovery | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-08-27 |
| 5547012 | Dissolved solids control in pulp production | Bruno Marcoccia, J. Robert Prough, Richard O. Laakso, Rolf Ryham, Jan T. Richardsen +1 more | 1996-08-20 |
| 5547543 | Apparatus for minimizing effluent discharges and recovering chemicals in a pulp mill | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-08-20 |
| 5547546 | Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device | J. Robert Prough | 1996-08-20 |
| 5529190 | Gas sparged hydrocyclone with foam separating vessel | Keith Carlton, Mahendra R. Doshi, Todd A. Salvato, Erwin D. Funk, Scott M. Clum | 1996-06-25 |
| 5518583 | Zero discharge mill distillation, salt recovery, and water management | Tuomo Nykanen, Brian F. Greenwood, Johan Gullichsen, Erkki Kiiskila, Esko Mattelmaki +4 more | 1996-05-21 |