Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5795438 | Method and apparatus for feeding multiple digesters | C. Bertil Stromberg, J. Wayne Chamblee | 1998-08-18 |
| 5753075 | Method and system for feeding comminuted fibrous material | C. Bertil Stromberg, J. Wayne Chamblee, Rolf Ryham, Erwin D. Funk | 1998-05-19 |
| 5674359 | Continuous cooking of cellulosic fibrous material with cold alkali impregnation | R. Fred Chasse, Kaj Henricson | 1997-10-07 |
| 5662775 | Continuous digester with dissolved solids handling | J. Robert Prough, Richard O. Laakso, R. Fred Chasse | 1997-09-02 |
| 5635026 | Cooking cellulose material with high alkali concentrations and/or high pH | Auvo Kettunen, Kaj Henricson, Aki Vilpponen, Jian E. Jiang | 1997-06-03 |
| 5620562 | Dissolved solids control in pulp production | J. Robert Prough, Richard O. Laakso, Joseph R. Phillips, Rolf Ryham, Jan T. Richardsen +1 more | 1997-04-15 |
| 5575890 | Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood | J. Robert Prough, Richard O. Laakso, Carl Luhrmann | 1996-11-19 |
| 5547012 | Dissolved solids control in pulp production | J. Robert Prough, Richard O. Laakso, Joseph R. Phillips, Rolf Ryham, Jan T. Richardsen +1 more | 1996-08-20 |
| 5536366 | Digester system for implementing low dissolved solids profiling | J. Robert Prough, Richard O. Laakso, R. Fred Chasse | 1996-07-16 |
| 5489363 | Pulping with low dissolved solids for improved pulp strength | J. Robert Prough, Richard O. Laakso, Joseph R. Phillips, Rolf Ryham, Jan T. Richardsen +1 more | 1996-02-06 |
| 5401361 | Completely coutercurrent cook continuous digester | J. Robert Prough, C. Bertil Stromberg, Richard O. Laakso | 1995-03-28 |