Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7208142 | Indanylidene compounds | Oskar Koch, Erich Dilk, William Johncock | 2007-04-24 |
| 6258963 | Benzylidene-.gamma.-butyrolactones, process for their preparation and their use as UV absorber | Oskar Koch, William Johncock | 2001-07-10 |
| 6153175 | Indanylidene compounds, a process for their preparation and their use as UV absorbers | Oskar Koch, Horst Surburg, Horst Sommer | 2000-11-28 |
| 6042814 | Sulphonic acids and their use as UV absorbers | Oskar Koch, Alfred Krempel | 2000-03-28 |
| 6039939 | N-acyl-hydroxyamino acid esters and their use | Jakob Ley | 2000-03-21 |
| 6037473 | Use of substituted benzazoles as UV absorbers, new benzazoles and processes for their preparation | Erich Dilk, William Johncock | 2000-03-14 |
| 5965066 | Indanylidene compounds, a process for their preparation and their use as UV absorbers | Oskar Koch, Horst Surburg, Horst Sommer | 1999-10-12 |
| 5961960 | Use of substituted benzazoles as UV absorbers, new benzazoles and processes for their preparation | Erich Dilk, William Johncock | 1999-10-05 |
| 5783725 | Stabilized lactic acid menthyl ester | Walter Kuhn, Alfred Korber, Detlef Hagena | 1998-07-21 |
| 5585091 | Use of benzazoles UV absorbers, new benzazoles and a process for their preparation | Ralf Pelzer, Horst Surburg, Horst Sommer, Alfred Krempel, Rudolf Hopp | 1996-12-17 |
| 5527519 | Finely divided, highly pure neutral zinc oxide powder, a process for its preparation and its use | Michael Miksits, Christoph Tiburtius, Jurgen Kischkewitz, Kai Butje, Albrecht Warth +1 more | 1996-06-18 |
| 4562067 | Preparation of novel dibenzoylmethane derivative sunscreen agents | Rudolf Hopp, Horst Finkelmeier | 1985-12-31 |
| 4455295 | N-(p-Sulfophenyl) cinnamamide as sunscreen agent | Rudolf Hopp, Horst Finkelmeier | 1984-06-19 |