Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6332542 | Tramp material removal from pulp feed system | Vic L. Bilodeau, R. Fred Chasse, James R. Prough, Craig A. Walley | 2001-12-25 |
| 6325890 | Feeding comminuted fibrous material | J. Robert Prough, Tim Pease | 2001-12-04 |
| 6315128 | Tramp material removal from pulp feed systems | — | 2001-11-13 |
| 6277240 | Method for continuously pulping cellulosic fibrous material | Bruno Marcoccia, Brian F. Greenwood | 2001-08-21 |
| 6248208 | Pretreatment of chips before cooking | Kaj Henricson, Aki Vilpponen, Hannu RÅMARK, Auvo Kettunen | 2001-06-19 |
| 6176971 | Heat economy enhancements for the recovery and use of energy obtained from spent cooking liquors | Ella Sun Yu, Rolf Ryham, R. Fred Chasse | 2001-01-23 |
| 6174411 | Continuous digester with inverted top separator | Richard O. Laakso, Kaj Henricson | 2001-01-16 |
| 6153300 | Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals | Patrick Sharpe, Louis O. Torregrossa, Joseph R. Phillips | 2000-11-28 |
| 6132556 | Method of controlling pulp digester pressure via liquor extraction | J Robert Prough, Bruno Marcoccia, Richard O. Laakso, Carl Luhrmann | 2000-10-17 |
| 6120647 | Simplified liquid removal system for a cellulose pulp digester | Brian F. Greenwood | 2000-09-19 |
| 6106668 | Method for feeding comminuted fibrous material | J. Wayne Chamblee, Bruno Marcoccia, Rolf Ryham, Erwin D. Funk | 2000-08-22 |
| 6024837 | Low temperature gas phase continuous digester | Richard O. Laakso, Kaj Henricson | 2000-02-15 |
| 6024227 | Tramp material removal from pulp feed systems | Vic L. Bilodeau, R. Fred Chasse, James R. Prough, Craig A. Walley | 2000-02-15 |
| 5985096 | Vertical pulping digester having substantially constant diameter | Bruno Marcoccia, J. Robert Prough, Jerry R. Johanson, Joseph R. Phillips | 1999-11-16 |
| 5958181 | Continuous cooking with a two-stage cool impregnation | J. Robert Prough, Kaj Henricson, Bruno Marcoccia | 1999-09-28 |
| 5882477 | Continuous digester with a low temperature gas-phase | Richard O. Laakso | 1999-03-16 |
| 5813758 | Concentric ring fluidizing mixer | Thomas R. Delcourt, Johan Gullichsen, Ronald Bain | 1998-09-29 |
| 5795438 | Method and apparatus for feeding multiple digesters | Bruno Marcoccia, J. Wayne Chamblee | 1998-08-18 |
| 5753075 | Method and system for feeding comminuted fibrous material | J. Wayne Chamblee, Bruno Marcoccia, Rolf Ryham, Erwin D. Funk | 1998-05-19 |
| 5401361 | Completely coutercurrent cook continuous digester | J. Robert Prough, Richard O. Laakso, Bruno Marcoccia | 1995-03-28 |
| 4944842 | Method for reducing contamination in pulp processing | Joseph R. Phillips, Louis O. Torregrossa | 1990-07-31 |
| 4927312 | Chip gates with air lock | Michael D. Meredith, Joseph R. Phillips, Richard O. Laakso | 1990-05-22 |