Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376741 | Process for the preparation of polycarbonates | Wolfgang Herrig, Jurgen Kadelka | 1994-12-27 |
| 5258484 | Process for the production of polycarbonate | Reinhard Schomacker, Gunther Weymans, Wolfgang Herrig, Jurgen Kirsch | 1993-11-02 |
| 5037220 | Printing ribbon comprising polycondensates | Volker Serini, Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Werner Waldenrath +1 more | 1991-08-06 |
| 4786708 | Use of films of polycondensates | Volker Serini, Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Werner Waldenrath +1 more | 1988-11-22 |
| 4654411 | High molecular weight polyesters, preparation and use thereof | Volker Serini, Bernhard Schulte, Werner Waldenrath, Dieter Freitag, Joachim Wank +1 more | 1987-03-31 |
| 4631338 | Process for the isolation of thermoplastic polycarbonate from solution with vapor of benzene or alkylbenzene | Karl-Heinrich Meyer, August Horsthemke | 1986-12-23 |
| 4617368 | Process for the production of colorless aromatic polyester and polyester carbonates | Dieter Freitag, Ludwig Bottenbruch | 1986-10-14 |
| 4482694 | High molecular weight aromatic polyesters and processes for their production | Dieter Freitag, Hans-Jurgen Meissner | 1984-11-13 |
| 4404363 | Separation of diphasic mixtures containing aromatic polyesters | Dieter Freitag, Volker Serini, John Goossens, Ludwig Bottenbruch | 1983-09-13 |
| 4367330 | Process for the preparation of aromatic polycarbonates by the phase boundary process | Erhard Tresper | 1983-01-04 |
| 4356129 | Process for the preparation of neutral phosphorous acid aryl esters | Erhard Tresper, Claus Wulff | 1982-10-26 |
| 4327208 | Continuous process for the hydrolytic production of polycaprolactam having a low-monomer and low-dimer content | Gunter Lehr, Hugo Vernaleken, Werner Nielinger, Erhard Tresper | 1982-04-27 |
| 4312642 | Method for the separate discharge of the individual phase streams of a multiple phase flow | Gunter Lehr, Karl-Dieter Lohr, Hugo Vernaleken | 1982-01-26 |
| 4290977 | Process for the production of neutral phosphoric acid esters | Claus Wulff, Erhard Tresper, Hugo Vernaleken, Harald Selbeck | 1981-09-22 |
| 4289685 | Process for the preparation of flame-resistant polycarbonates | Frank Druschke, Dieter Margotte, Erhard Tresper, Ludwig Bottenbruch, Wolfgang Cohnen | 1981-09-15 |
| 4267127 | Process for the production of phosphoric acid triesters | Harald Selbeck, Claus Wulff, Erhard Tresper, Hugo Vernaleken | 1981-05-12 |