Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645724 | Rotor-equipped cylindrical screens | — | 1997-07-08 |
| 5476178 | Rotor for pressurized hydrodynamic purification of paper pulp and equipment fitted with this rotor | — | 1995-12-19 |
| 5407538 | Device for separating a mixture of paper pulp and contaminants | — | 1995-04-18 |
| 5364501 | Enzymatic deinking process with pH shift and addition of alkaline cellulase | Jean-Luc A. G. Baret, Marc Leclerc | 1994-11-15 |
| 5293677 | Process of making a cylindrical slotted sieve for paper pulp strainer | — | 1994-03-15 |
| 5255791 | End rim of cylindrical sieve for paper pulp strainer and classifier and process, of making it | — | 1993-10-26 |
| 5182031 | Process and device for deaeration of liquids | — | 1993-01-26 |
| 5128028 | Sieve for paper pulp strainer and classifier | — | 1992-07-07 |
| 4938423 | Paper pulp beater | — | 1990-07-03 |
| 4915821 | Apparatus for treatment of old printed papers with short and long fiber separation | — | 1990-04-10 |
| 4898665 | Screens for paper pulp purifiers | — | 1990-02-06 |
| 4842777 | Pressurized mixing injector | — | 1989-06-27 |
| 4838301 | Draining valve for waste paper processing appliances | — | 1989-06-13 |
| 4721562 | Aerating apparatus | Wolfgang Barnscheidt, Horst von Borries, Robert Rautenbach, August Schiffermuller, Hubert Zimmermann | 1988-01-26 |
| 4607802 | Turbines for fiber separation | — | 1986-08-26 |
| 4604193 | Method and apparatus for sorting out a mixture of paper pulp and contaminants | — | 1986-08-05 |
| 4447320 | Device for cleaning and recovering paper pulp | — | 1984-05-08 |
| 4443296 | Processes and devices for the disintegration of cellulose materials | — | 1984-04-17 |
| 4369093 | Processes and devices for the disintegration of cellulose materials | — | 1983-01-18 |
| 4200537 | Apparatus for the purification of paper pulp | — | 1980-04-29 |