Issued Patents All Time
Showing 25 most recent of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9260818 | Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method | Namhee Shin, Ventzislav H. Kirov, William J. Cann | 2016-02-16 |
| 8734610 | Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method | Namhee Shin, Ventzislav H. Kirov, William J. Cann | 2014-05-27 |
| 8262856 | Processes and systems for the bleaching of lignocellulosic pulps following cooking with soda and anthraquinone | Pam O'Leary, Namhee Shin | 2012-09-11 |
| 8246750 | Apparatus and method for hydrolysis of cellulosic material in a multi-step process to produce C5 and C6 sugars using a single vessel | Namhee Shin, Thomas Pschorn | 2012-08-21 |
| 8192549 | Apparatus and method for hydrolysis of cellulosic material in a two-step process | Namhee Shin, Thomas Pschorn | 2012-06-05 |
| 7988822 | Treatment vessel for straw or other light bulky material | — | 2011-08-02 |
| 7658818 | Method for converting a digester for use as a gas phase and hydraulic phase continuous digester | Keith Vogel, John Bolles, Patrick Sullivan | 2010-02-09 |
| 7556713 | Method and system for feeding cellulose chips to a high pressure continuous cooking system | — | 2009-07-07 |
| 7455749 | Gas phase continuous digester having an inverted top separator with liquor injection | Keith Vogel, John Bolles, Patrick Sullivan, Brian F. Greenwood | 2008-11-25 |
| 7309401 | Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester | Keith Vogel, John Bolles, Patrick Sullivan | 2007-12-18 |
| 7105076 | Gas phase continuous digester having an inverted top separator with liquor injection | Keith Vogel, John Bolles, Patrick Sullivan, Brian F. Greenwood | 2006-09-12 |
| 6841042 | Feeding comminuted fibrous material using high pressure screw and centrifugal pumps | Aaron Leavitt, J. Robert Prough | 2005-01-11 |
| 6673201 | Top separator with intraseal for digester vessel in a pulp or fiber processing system | Keith Vogel, John Bolles | 2004-01-06 |
| 6589391 | Top separator with intraseal for digester vessel in a pulp or fiber processing system | Keith Vogel, John Bolles | 2003-07-08 |
| 6582554 | Continuous digester having a sectioned top separator with multiple liquor extraction ports | Kaj Henricson, Richard O. Laakso, John Bolles, Keith Vogel, Patrick Sullivan | 2003-06-24 |
| 6576084 | Method of pretreating pulp with yield or strength-enhancing additive | Joseph R. Phillips | 2003-06-10 |
| 6569289 | Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali | Joseph R. Phillips | 2003-05-27 |
| 6551462 | System for feeding comminuted fibrous material | J. Robert Prough, Tim Pease | 2003-04-22 |
| 6544384 | Pretreatment of chips before cooking | Kaj Henricson, Aki Vilpponen, Hannu RÅMARK, Auvo Kettunen | 2003-04-08 |
| 6506283 | Pretreatment of chips before cooking | Kaj Henricson, Aki Vilpponen, Hannu RÅMARK, Auvo Kettunen | 2003-01-14 |
| 6451172 | In-line drainer enhancements | Mark D. Barrett, J. Robert Prough | 2002-09-17 |
| 6447645 | Feeding cellulose material to a treatment vessel | Mark D. Barrett, J. Robert Prough | 2002-09-10 |
| 6436233 | Feeding cellulose material to a treatment vessel | Mark D. Barrett, J. Robert Prough | 2002-08-20 |
| 6368453 | Chip feeding to a comminuted cellulosic fibrous material treatment vessel | Auvo Kettunen, Richard O. Laakso, J. Robert Prough, Jay Miele | 2002-04-09 |
| 6336993 | Metal removal from comminuted fibrous material during feeding | — | 2002-01-08 |