Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5824187 | Method for the continuous cooking of pulp | Ole J. Richter | 1998-10-20 |
| 5716497 | Method and device for the continuous cooking of pulp | Ole J. Richter | 1998-02-10 |
| 5681453 | Reciprocal movable screens in a vertically elongated vessel | Ole J. Richter | 1997-10-28 |
| 5300195 | Continuous vertical digester apparatus | Ole J. Richter | 1994-04-05 |
| 5236553 | Continuous cooking with reduced horsepower and pulp degradation | — | 1993-08-17 |
| 5069752 | Digester screen switching | — | 1991-12-03 |
| 5053108 | High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips | — | 1991-10-01 |
| 4976586 | Pump with separate fluidizing vaned shaft adjacent impeller | Ole J. Richter | 1990-12-11 |
| 4881286 | Effective diffuser/thickener screen backflushing | Ole J. Ricter, Finn Jacobsen | 1989-11-21 |
| 4840047 | Multiscreen pressure diffuser | Ole J. Richter | 1989-06-20 |
| 4793161 | Effective diffuser/thickener screen backflushing | Ole J. Ricter, Finn Jacobsen | 1988-12-27 |
| 4746400 | Method of treating cellulosic chips in a vessel with a false bottom | Michael I. Sherman | 1988-05-24 |
| 4721231 | Chips bin blockage preventing | — | 1988-01-26 |
| 4637878 | Reciprocal movable screens in a vertically elongated vessel | Ole J. Richter | 1987-01-20 |
| 4556494 | Method of diffusion washing or thickening of pulp | Ole J. Richter | 1985-12-03 |
| 4529482 | Apparatus for the treatment of pulp having oscillating distributing wiper blades | Ole J. Richter | 1985-07-16 |
| 4516887 | Feeder deflection compensation | Ole J. Richter | 1985-05-14 |
| 4513515 | Gas treatment of particulate materials in storage containers | Ole J. Richter | 1985-04-30 |
| 4432836 | Vessel false bottoming | Michael I. Sherman | 1984-02-21 |
| 4430029 | High pressure feeder deflection compensation | Ole J. Richter | 1984-02-07 |
| 4394267 | Diffuser assembly | Ole J. Richter | 1983-07-19 |
| 4375410 | Reciprocating diffuser arrangements in an elongated vessel | Ole J. Richter | 1983-03-01 |
| 4372711 | High pressure feeding | Michael I. Sherman | 1983-02-08 |
| 4354777 | High pressure feeder deflection prevention | Jens Ramstad | 1982-10-19 |
| 4338049 | High pressure feeder pivotal center screen | Michael I. Sherman | 1982-07-06 |