Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700425 | Device for the pretreatment of electronic scrap | — | 1997-12-23 |
| 5609764 | Extraction column or tower with separate volumes | — | 1997-03-11 |
| 5522153 | Device and process for pre-treating electronic circuit scraps | — | 1996-06-04 |
| 5520814 | Process for recovering spent metal etching solutions | — | 1996-05-28 |
| 5460195 | Device for washing metal-containing sludges | — | 1995-10-24 |
| 5252189 | Method of processing used appliance batteries | — | 1993-10-12 |
| 5196154 | Apparatus for the treatment of metal-laminated plastics scrap | — | 1993-03-23 |
| 5190649 | Apparatus for working up metal-charged waste sludges | — | 1993-03-02 |
| 4828661 | Process for recovery of metals from metal/plastic waste | — | 1989-05-09 |
| 4232703 | Safety close-off valve arrangement for pipe conduit systems and installations | — | 1980-11-11 |