Issued Patents All Time
Showing 26–48 of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5284981 | Ion exchangers modified with mercapto amines | Udo Rudolph, Norbert Bachem | 1994-02-08 |
| 5275758 | Production of ultrafine suspensions of bisphenol, sodium hydroxide and water | Reinhard Schomacker, Jurgen Kadelka, Jürgen Heuser, Gunther Weymans, Konrad Hable | 1994-01-04 |
| 5260418 | Washing of polycarbonates with cascading train of centrifuges | Jürgen Heuser, Gunther Weymans | 1993-11-09 |
| 5235035 | Process for lowering the crystallization temperature of polyarylene sulphides | Ernst-Ulrich Dorf | 1993-08-10 |
| 5235026 | Continuous production of polycarbonates | Hermann Kauth, Gunther Weymans, Zoltan Kricsfalussy, Wolfgang Alewelt, Jürgen Heuser | 1993-08-10 |
| 5227458 | Polycarbonate from dihydroxydiphenyl cycloalkane | Dieter Freitag, Uwe Westeppe, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans +2 more | 1993-07-13 |
| 5212206 | Ion exchange modified with mercapto amines | Udo Rudolph, Norbert Bachem | 1993-05-18 |
| 5210328 | Process for the preparation of substituted cycloalkylidene bisphenols | Dieter Freitag, Alfred Eitel, Helmut Waldmann, Uwe Westeppe, Manfred Hajek +3 more | 1993-05-11 |
| 5126428 | Polycarbonate from dihydroxy diphenyl cycloalkane | Dieter Freitag, Uwe Westeppe, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans +2 more | 1992-06-30 |
| 5115050 | Polyamide moulding compositions containing finely divided polyarylene sulphides | Werner Nielinger, Karsten-Josef Idel, Uwe Westeppe, Dieter Freitag, Hans-Detlef Heinz | 1992-05-19 |
| 5015784 | Isomerization of bisphenols | Udo Rudolph | 1991-05-14 |
| 4990595 | Process for lowering the melt viscosity of aromatic polycarbonates, aromatic polyester carbonates and aromatic and/or araliphatic polyesters with super-critical gases | Hans-Joachim Traechkner, Karl-Dieter Lohr, Wolfgang Wehnert, Wolfgang Arlt, Hanns-Ingolf Paul | 1991-02-05 |
| 4982014 | Dihydroxydiphenyl cycloalkanes, their production and their use for the production of high molecular weight polycarbonates | Dieter Freitag, Uwe Westeppe, Karl-Herbert Fritsch, Carl Casser, Gunther Weymans +2 more | 1991-01-01 |
| 4960864 | Process for recovering thermoplastic polymers from dispersion | Christian Lindner, Karl-Heinz Ott | 1990-10-02 |
| 4912263 | Ionic exchangers modified with thiazolines | Udo Rudolph, Jurgen Hinz, Norbert Bachem | 1990-03-27 |
| 4614763 | Molding compounds of thermoplastic polyamide and graft rubber | Ludwig Trabert, Rudolf Binsack, Christian Lindner, Josef Merten, Heinrich Haupt +2 more | 1986-09-30 |
| 4600753 | Two stage process for the production of aromatic polyester-carbonate | Dieter Freitag, Gerhard Henes, Ludwig Bottenbruch, Peter Tacke | 1986-07-15 |
| 4393009 | Process for the preparation of aromatic dicarboxylic acid dichlorides | Dieter Freitag, Ludwig Bottenbruch | 1983-07-12 |
| 4369293 | Catalyst for the preparation of bisphenols | Frieder Heydenreich, Lothar Klein, Hans-Jurgen Meissner, Norbert Bachem | 1983-01-18 |
| 4356129 | Process for the preparation of neutral phosphorous acid aryl esters | Uwe Hucks, Erhard Tresper | 1982-10-26 |
| 4346210 | Process for the preparation of polycarbonates catalyzed by cyclic aza compounds | Wolfgang Alewelt, Dieter Margotte, Hugo Vernaleken | 1982-08-24 |
| 4290977 | Process for the production of neutral phosphoric acid esters | Uwe Hucks, Erhard Tresper, Hugo Vernaleken, Harald Selbeck | 1981-09-22 |
| 4267127 | Process for the production of phosphoric acid triesters | Harald Selbeck, Uwe Hucks, Erhard Tresper, Hugo Vernaleken | 1981-05-12 |