Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5088831 | Device for treating material mixtures | — | 1992-02-18 |
| 5067660 | Stress regulator for pulp grinding apparatus and method | — | 1991-11-26 |
| 5042726 | Apparatus and method for conjoint adjustment of both the inner and outer grinding spaces of a pulp defibrating apparatus | — | 1991-08-27 |
| 4955549 | Apparatus for treatment of fibre suspensions | — | 1990-09-11 |
| 4954221 | Apparatus for feeding lignocellulose-containing material through a steam screen into a refiner | Johan Johansson, Anders Mokvist | 1990-09-04 |
| 4890796 | Combined hydrostatic/hydrodynamic bearing system for grinding apparatus | — | 1990-01-02 |
| 4878997 | Method and apparatus for manufacturing fibre pulp | — | 1989-11-07 |
| 4801099 | Combined hydrostatic/hydrodynamic bearing system for grinding apparatus | — | 1989-01-31 |
| 4614304 | Rotor/mixer for controlling mixing and refining of pulp material | Johan Ingvar Johansson | 1986-09-30 |
| 4606789 | Method for manufacturing cellulose pulp using plural refining and fiber separation steps with reject recycling | — | 1986-08-19 |
| 4600475 | Refining apparatus with radial passageways for steam recovery | Johan Johansson | 1986-07-15 |
| 4457804 | Apparatus for producing fiber pulp from fibrous lignocellulose containing material | — | 1984-07-03 |
| 4378092 | Method and apparatus for grinding pulp stock in pulp defibrating apparatus of the double rotating disc type | — | 1983-03-29 |
| 4355767 | Device in grinding apparatus | Inge Johansson | 1982-10-26 |
| 4311555 | Method of manufacturing fiberboard | — | 1982-01-19 |
| 4283016 | Method and apparatus for controlling the effect of the centrifugal force on the stock in pulp defibrating apparatus | — | 1981-08-11 |
| 4283252 | Method and apparatus for producing fiber pulp from fibrous lignocellulose containing material | — | 1981-08-11 |
| 4253613 | Method and apparatus for controlling the effect of the centrifugal force on the stock in pulp defibrating apparatus | — | 1981-03-03 |
| 4236959 | Method of producing fiber pulp by grinding fibrous material in a steam environment | — | 1980-12-02 |
| 4235665 | Method and apparatus for producing fiber pulp in a steam pressurized grinding system | Inge Johansson, Ake Sandstron, Anders Mukvist, Lars Elander | 1980-11-25 |