Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5496864 | Expandable styrene polymers | Rolf Henn, Klaus Hahn, Hans Ho/ nl, Walter Heckmann, Karl-Heinz Wassmer +1 more | 1996-03-05 |
| 5306431 | Process for automatically controllable reduction of the nitrite content of nitrite-containing aqueous solutions to values below 1 mg/1 | Hubert Wolf, Klaus Stuetzel, Friedhelm Brandner, Manfred Diehl | 1994-04-26 |
| 5300554 | Aqueous contact adhesive dispersions, process for their preparation, and their use | Manfred Krell, Wilfried Huster | 1994-04-05 |
| 5275791 | Process for the leaching of gold and silver with cyanidic leaching solution and controlled addition of hydrogen peroxide | Helmut Knorre, Andrew Griffiths, Juergen Loroesch | 1994-01-04 |
| 5208265 | Foam based on an impact copolymer | Isidoor De Grave, Onno Graalmann | 1993-05-04 |
| 5203436 | Reinforced tubular door support | Enno Wieting | 1993-04-20 |
| 5204008 | Process for the detoxification of aqueous solutions containing cyanohydrins and/or nitriles | Manfred Diehl, Hubert Wolf | 1993-04-20 |
| 5200161 | Process for the separation of hydrogen cyanide from gases and waste gases | Hubert Wolf, Manfred Diehl | 1993-04-06 |
| 5174394 | Apparatus for cleaning layers of earth | Andreas Monning | 1992-12-29 |
| 5077322 | Foams based on an olefin copolymer | Isidoor De Grave, Wolfram Koegel, Hermann Tatzel, Onno Graalmann, Juergen Kerth +1 more | 1991-12-31 |
| 5069725 | Method and apparatus for cleaning layers of earth | Andreas Muonning | 1991-12-03 |
| 5068038 | Method of lowering the AOX content in water | Hubert Wolf | 1991-11-26 |
| 4808039 | Coupling mechanism for interconnecting sealing plates that are to be built into a sealing wall | — | 1989-02-28 |
| 4737286 | Microfiltration membrane filter | Charles T. Badenhop | 1988-04-12 |
| 4731232 | Process for the purification of industrial gases or waste gases | Helmut Knorre | 1988-03-15 |
| 4627992 | Process for the production of filter elements based on aromatic polyamide | Charles T. Badenhop, Anna-Luise Bourguignon | 1986-12-09 |
| 4567009 | Production of microfiltration membrane filter | Charles T. Badenhop | 1986-01-28 |
| 4416786 | Process for the treatment of continuous waste water streams having changing contents of different oxidizable materials with hydrogen peroxide | Helmut Knorre, Klaus Stutzel | 1983-11-22 |
| 4280914 | Process for automatically controlling the detoxification of waste waters containing nitrite ions | Helmut Knorre | 1981-07-28 |
| 4253781 | Method and an apparatus for providing a grouted anchorage against hydrostatic pressure | Siegfried Brandl, Rudolf Bartoszek | 1981-03-03 |