Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9522480 | Continuous method for producing a lightweight sandwich panel and lightweight sandwich panels producible according to this method | Lutz Helmrich | 2016-12-20 |
| 5700358 | Recovery of caprolactam from oligomers and/or polymers of caprolactam | Hugo Fuchs, Josef Ritz | 1997-12-23 |
| 5639706 | Hydrogenation catalyst based on a platinum metal partially poisoned with finely divided sulfur | Franz-Josef Weiss, Hugo Fuchs, Heinz-Walter Schneider | 1997-06-17 |
| 5637700 | Purification of caprolactam | Hugo Fuchs, Claus-Ulrich Priester | 1997-06-10 |
| 5560895 | Method of use of a hydrogenation catalyst based on a platinum metal partially poisoned with finely divided sulfur | Franz-Josef Weiss, Hugo Fuchs, Heinz-Walter Schneider | 1996-10-01 |
| 5496789 | Hydrogenation catalyst based on a platinum metal partially poisoned with finely divided sulfur | Franz-Josef Weiss, Hugo Fuchs, Heinz-Walter Schneider | 1996-03-05 |
| 5458740 | Process for the purification of crude caprolactam | Thomas P. Losier, Donald R. Johnson, Hugo Fuchs, Josef Ritz | 1995-10-17 |
| 5360905 | Recovery of caprolactam from oligomers and/or polymers of caprolactam | Hugo Fuchs, Claus-Ulrich Priester, Erwin Brunner, Josef Ritz, Michael Kopietz | 1994-11-01 |
| 5359062 | Recovery of caprolactam from polycaprolactam | Hugo Fuchs, Josef Ritz, Claus-Ulrich Priester | 1994-10-25 |
| 5350847 | Purification of caprolactam | Hugo Fuchs, Claus-Ulrich Priester | 1994-09-27 |
| 5264571 | Preparation of caprolactam by Beckmann rearrangement of cyclohexanone oxime | Hugo Fuchs, Josef Ritz | 1993-11-23 |
| 5175316 | Cyclic preparation of cyclohexene oxide, cyclohexanol and cyclohexanone | David Agar, Paul-Michael Bever, Hans H. Schuster | 1992-12-29 |
| 5155081 | Platinum-on-graphite catalysts | Werner Steigleiter, Wolfgang Hoelderich, Franz-Josef Weiss, Hugo Fuchs, Luc Guns +1 more | 1992-10-13 |
| 5124138 | Work-up of aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxyl-ammonium and ammonium salts | Hugo Fuchs, Josef Ritz | 1992-06-23 |
| 5120699 | Platinum-on-graphite catalysts and the use thereof | Franz-Josef Weiss, Hugo Fuchs, Werner Steigleiter, Wolfgang Hoelderich, Luc Guns +1 more | 1992-06-09 |
| 5032684 | Continuous purification of caprolactam | Josef Ritz, Hugo Fuchs, David Agar, Rolf Fischer, Uwe Vagt | 1991-07-16 |
| 4997635 | Preparation of crystalline hydroxylammonium sulfate having a low ammonium sulfate content | Hugo Fuchs, Josef Ritz, Franz-Josef Weiss | 1991-03-05 |
| 4931592 | Storability of molten cyclohexanone oxime | Hugo Fuchs, David Agab, Josef Ritz | 1990-06-05 |
| 4882430 | Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof | Emile De Decker, Hugo Fuchs, Bernhard Holzknecht, Josef Ritz | 1989-11-21 |
| 4814511 | Working up cyclohexyl hydroperoxide containing reaction mixtures | Rolf Schnabel, Juergen Hartig, Josef Ritz | 1989-03-21 |
| 4804473 | Removal of water-immiscible solvents from offgases containing same | Uwe Brand, Emile DeDecker, Ernst Deuker, Hugo Fuchs, Klaus Kartte +1 more | 1989-02-14 |
| 4804754 | Preparation of caprolactam from cyclohexanone oxime by Beckmann rearrangement | Emile De Decker, Jozef Oostvogels, Gerard van Wauwe | 1989-02-14 |
| 4755604 | Preparation of 3-methylpiperidine | Gerhard Frank | 1988-07-05 |
| 4598058 | Molded catalyst materials containing reduced cobalt and/or nickel particles | Gerhard Frank, Paul Duffner, Hans J. Wilfinger | 1986-07-01 |
| 4587228 | Molded iron catalyst material and its preparation | Gerhard Frank | 1986-05-06 |