Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5824187 | Method for the continuous cooking of pulp | Johan C. F. C. Richter | 1998-10-20 |
| 5716497 | Method and device for the continuous cooking of pulp | Johan C. F. C. Richter | 1998-02-10 |
| 5681453 | Reciprocal movable screens in a vertically elongated vessel | Johan C. F. C. Richter | 1997-10-28 |
| 5547570 | Screening device | — | 1996-08-20 |
| 5300195 | Continuous vertical digester apparatus | Johan C. F. C. Richter | 1994-04-05 |
| 5027620 | Diffuser with flexible bellows and internal actuator | — | 1991-07-02 |
| 4976586 | Pump with separate fluidizing vaned shaft adjacent impeller | Johan C. F. C. Richter | 1990-12-11 |
| 4971694 | Double diffuser with backflush pistons | — | 1990-11-20 |
| 4944167 | Backflushing pressure diffuser screens | Finn Jacobsen | 1990-07-31 |
| 4908896 | Backflushing pressure diffuser screens | Finn Jacobsen | 1990-03-20 |
| 4840047 | Multiscreen pressure diffuser | Johan C. F. C. Richter | 1989-06-20 |
| 4637878 | Reciprocal movable screens in a vertically elongated vessel | Johan C. F. C. Richter | 1987-01-20 |
| 4577663 | Fluid accumulator | Per Andersen | 1986-03-25 |
| 4556494 | Method of diffusion washing or thickening of pulp | Johan C. F. C. Richter | 1985-12-03 |
| 4529482 | Apparatus for the treatment of pulp having oscillating distributing wiper blades | Johan C. F. C. Richter | 1985-07-16 |
| 4516887 | Feeder deflection compensation | Johan C. F. C. Richter | 1985-05-14 |
| 4513515 | Gas treatment of particulate materials in storage containers | Johan C. F. C. Richter | 1985-04-30 |
| 4508473 | Simple dry feeder | Erwin D. Funk | 1985-04-02 |
| 4430029 | High pressure feeder deflection compensation | Johan C. F. C. Richter | 1984-02-07 |
| 4394267 | Diffuser assembly | Johan C. F. C. Richter | 1983-07-19 |
| 4375410 | Reciprocating diffuser arrangements in an elongated vessel | Johan C. F. C. Richter | 1983-03-01 |
| 4276167 | Diffuser arrangements | Johan C. F. C. Richter | 1981-06-30 |