Issued Patents All Time
Showing 25 most recent of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5077438 | Process for the preparation of acrolein | Matthias Schwarzmann, Kurt Weinacht, Franz Merger | 1991-12-31 |
| 5047161 | Preparation of isometric cobalt- and titanium-containing magnetic iron oxides | Hartmut Hibst, Helmut Jakusch | 1991-09-10 |
| 5015785 | Preparation of mixtures of isomeric cresols with a molar ratio of para- to meta-cresol of at least 0.6:1 to 10:1 | Helmut Lermer, Matthias Schwarzmann, Toni Dockner | 1991-05-14 |
| 5009877 | Stabilization of acicular ferromagnetic chromium dioxide | Laszlo Marosi, Herbert Haberkorn, Rainer Feser, Werner Huebner, Helmut Jakusch | 1991-04-23 |
| 5002639 | Separation of ortho-, meta- and para-tolunitrile from ternary mixtures of the isomers | Harald Rust, Helmut Lermer, Fritz Naeumann | 1991-03-26 |
| 4967013 | Preparation of hydroxybenzaldehydes | Helmut Lermer, Harald Rust, Gerhard Fritz, Hardo Siegel | 1990-10-30 |
| 4960462 | Acicular, ferromagnetic metal particles essentially consisting of iron, and their preparation | Michael Mueller, Kalus-Dieter Hoppe, Ekkehard Schwab, Helmut Auweter, Rainer Feser | 1990-10-02 |
| 4933004 | Preparation of acicular ferromagnetic metal particles of substantially iron | Klaus-Dieter Hoppe, Jenoe Kovacs, Rainer Feser, Helmut Jakusch | 1990-06-12 |
| 4826671 | Preparation of acicular .alpha.-Fe.sub.2 O.sub.3 | Volker Arndt, Rainer Feser, Helmut Jakusch | 1989-05-02 |
| 4810401 | Superparamagnetic solid particles | Gunther Mair | 1989-03-07 |
| 4781851 | Preparation of ferromagnetic chromium dioxide | Herbert Haberkorn, Laszlo Marosi, Werner Huebner, Helmut Jakusch | 1988-11-01 |
| 4774072 | Preparation of acicular alpha-Fe.sub.2 O.sub.3 | Volker Arndt, Bernd Meyer, Rainer Feser, Helmut Jakusch | 1988-09-27 |
| 4770903 | Preparation of cobalt-containing, acicular, magnetic iron oxides | Ekkehard Schwab, Wilhelm Schloesser, Rainer Feser | 1988-09-13 |
| 4755315 | Preparation of cobalt-containing isotropic magnetic iron oxides | Rainer Feser, Helmut Jakusch, Peter Rudolf, Guenter Vaeth, Udo Kullmann | 1988-07-05 |
| 4755395 | Preparation of acicular cobalt-containing ferrimagnetic iron oxides | Rainer Feser, Werner Loeser, Peter Rudolf, Guenter Vaeth, Helmut Jakusch +1 more | 1988-07-05 |
| 4729785 | Preparation of acicular ferromagnetic metal particles consisting essentially of iron | Ekkehard Schwab, Peter Rudolf, Guenter Vaeth, Helmut Jakusch, Jenoe Kovacs | 1988-03-08 |
| 4631140 | Ferrimagnetic particles and their preparation | Helmut Jakusch | 1986-12-23 |
| 4495246 | Acicular ferromagnetic chromium dioxide particles | Jenoe Kovacs, Norbert Mueller, Helmut Jakusch | 1985-01-22 |
| 4464352 | Manufacture of acicular ferrimagnetic iron oxide | Horst Autzen, Herbert Motz, Peter Rudolf, Wilhelm Sarnecki, Guenter Vaeth | 1984-08-07 |
| 4439231 | Preparation of acicular ferromagnetic metal particles consisting essentially of iron | Peter Rudolf, Wilhelm Sarnecki, Werner Loeser, Jenoe Kovacs, Helmut Jakusch | 1984-03-27 |
| 4420330 | Stabilization of pyrophoric ferromagnetic acicular metal particles consisting essentially of iron | Helmut Jakusch, Werner Loeser, Eberhard Koester, Peter Rudolf, Werner Senkpiel | 1983-12-13 |
| 4378240 | Preparation of acicular ferromagnetic metal particles consisting essentially of iron | Hansjoerg Siegle, Hans H. Reich, Horst Autzen, Werner Loeser, Eckhard Hetzel +1 more | 1983-03-29 |
| 4367214 | Manufacture of acicular ferrimagnetic iron oxide | Wilhelm Sarnecki, Laszlo Marosi, Horst Autzen, Manfred Ohlinger | 1983-01-04 |
| 4360377 | Ferromagnetic metal particles, consisting essentially of iron and carrying a surface coating, and their production | Hermann Roller, Wilhelm Sarnecki, Werner Balz | 1982-11-23 |
| 4344791 | Manufacture of acicular ferromagnetic iron particles | Wilhelm Sarnecki, Laszlo Marosi, Manfred Ohlinger, Werner Loeser | 1982-08-17 |