Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6592832 | Method for producing highly pure lithium salts | Holger Friedrich, Joachim Pfeffinger | 2003-07-15 |
| 6538054 | Flame-proof moulding compounds | Martin Klatt, Brigitte Gareiss, Motonori Yamamoto, Herbert Fisch, Michael Nam +1 more | 2003-03-25 |
| 6503969 | Flame-retardant polyester molding compositions containing flame retardant nitrogen compounds and diphosphinates | Martin Klatt, Michael Nam, Herbert Fisch | 2003-01-07 |
| 6190567 | Breaking down hydroxylamine in aqueous solutions | Frank Hanus, Hans-Michael Schneider, Otto Watzenberger, Uwe Wegmann | 2001-02-20 |
| 6180235 | Phosphorus-containing iron powders | Gabriele Friedrich, Reinhold Schlegel | 2001-01-30 |
| 6110230 | Use of carboxyamide-polysiloxanes for water proofing leather | Holger Friedrich, Michael Kneip | 2000-08-29 |
| 6036742 | Finely divided phosphorus-containing iron | Gabriele Friedrich, Reinhold Schlegel | 2000-03-14 |
| 5993569 | Silicon-containing iron powders | Joachim Simon, Reinhold Schlegel | 1999-11-30 |
| 5919348 | Modification of the flow resistance of diaphragms | Holger Friedrich, Klaus-Dieter Hoppe, Dieter Schlafer, Kurt Hecky | 1999-07-06 |
| 5899393 | Recycling of diaphragms | Rudi Kroner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich | 1999-05-04 |
| 5876785 | Recycling of diaphragms | Rudi Kroner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich | 1999-03-02 |
| 5856543 | Silanes comprising branched alkyl chains | Holger Friedrich, Harald Keller | 1999-01-05 |
| 5837107 | Process for production of aqueous solutions of free hydroxylamine | Otto Watzenberger, Hans-Michael Schneider, Albrecht Friederang | 1998-11-17 |
| 5817853 | Preparation of acyloxyalkoxysilanes | Holger Friedrich, Norbert Mronga, Raimund Schmid | 1998-10-06 |
| 5783161 | Stabilized hyroxylamine solutions | Hans-Michael Schneider | 1998-07-21 |
| 5755951 | Regeneration of plastic diaphragm | Rudi Kroner, Hans-Michael Schneider, Holger Friedrich, Kurt Hecky, Dieter Schlafer +1 more | 1998-05-26 |
| 5077023 | Reduction in the rate of oxidation of sulfite solutions | Klaus-Dieter Hoppe, Paul-Michael Bever, Matthias Kraume | 1991-12-31 |
| 4995950 | Preparation of alkali metal nitrates | Wolfgang Kochanek | 1991-02-26 |
| 4879102 | Regeneration of wash solutions containing Fe(II) and Fe(III) chelate complexes | Klaus-Dieter Hoppe, Siegfried Schreiner | 1989-11-07 |
| 4837002 | Removal of chlorate from caustic soda | Dieter Schlaefer, Wolfgang Kochanek | 1989-06-06 |
| 4830842 | Preparation of pure boron trifluoride | Hans H. Reich | 1989-05-16 |
| 4786211 | Filling cavities in mining | Berthold Mueller, Wilhelm Volkenborn | 1988-11-22 |
| 4395273 | Preparation of multi-trace element fertilizers | Bernhard Purucker, Eberhard Rother, Geerd F. Juergens, Dieter Wagner | 1983-07-26 |
| 4360504 | Simultaneous destruction of trace components in the reaction off-gas from the synthesis of melamine | Klaus Blanck, Winfried Dethlefsen, Anton Jungbauer, Ernst-Juergen Schier, Hans-Ulrich Schlimper +1 more | 1982-11-23 |
| 4336234 | Preparation of storage-stable, pumpable and pourable aluminosilicate suspensions by wet milling | Hans-Ulrich Schlimper, Dieter Roth, Ludwig Kreitner, Heinrich Spahn | 1982-06-22 |