Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5728867 | Carbonyloxy-substituted azulenesquaric acid dyes, intermediates therefor and optical recording medium | Michael Schmitt, Wolfgang Schrott, Peter Neumann, Sibylle Brosius, Klaus D. Schomann | 1998-03-17 |
| 5221751 | Heterocyclic polymethine dyes with carbamate or amide groups | Michael Acker, Bernhard Albert, Sibylle Brosius, Klaus D. Schomann | 1993-06-22 |
| 5169975 | Binary azulenesquaric acid dyes, their intermediates and optical recording medium | Michael Schmitt, Bernhard Albert, Sibylle Brosius, Klaus D. Schomann | 1992-12-08 |
| 5124240 | Optical recording medium | Sibylle Brosius, Bernhard Albert, Michael Schmitt, Klaus D. Schomann, Ulrich Harten | 1992-06-23 |
| 5122435 | Amido-containing azulene squaric acid dyes, intermediates therefor and optical recording medium | Michael Schmitt, Bernhard Albert, Sibylle Brosius, Klaus D. Schomann | 1992-06-16 |
| 5093492 | Methine dyes and optical recording medium containing same | Michael Acker, Mathias Dust, Peter Neumann, Sibylle Brosius, Klaus D. Schomann | 1992-03-03 |
| 5087727 | A zulenes containing a urethane group | Wolfgang Schrott, Peter Neumann, Michael Schmitt, Sibylle Brosius, Klaus D. Schomann | 1992-02-11 |
| 5084592 | Azulenesquaric acid dyes, azulene intermediates therefor, and optical recording medium | Wolfgang Schrott, Peter Neumann, Sibylle Brosius, Helmut Barzynski, Klaus D. Schomann | 1992-01-28 |
| 5064702 | Quinoxalinepentamethine dyes and optical recording medium containing same | Michael Acker, Peter Neumann, Bernhard Albert, Sibylle Brosius, Klaus D. Schomann | 1991-11-12 |
| 5002863 | Naphtholactamtrimethine dyes and optical recording medium containing same | Matthias Dust, Peter Neumann, Michael Acker, Heidi Benthack-Thoms, Klaus D. Schomann | 1991-03-26 |
| 4966798 | Optical recording medium | Sibylle Brosius, Helmut Barzynski, Karl-Heinz Feuerherd, Wolfgang Schrott, Bernhard Albert +3 more | 1990-10-30 |
| 4946762 | Monosubstituted and disubstituted phthalocyanines | Bernhard Albert, Gerhard Wagenblast | 1990-08-07 |
| 4876356 | Naphtholactam dyes and optical recording medium containing these days | Matthias Dust, Peter Neumann, Ernst Schefczik, Heidi Benthack-Thoms, Helmut Barzynski +2 more | 1989-10-24 |
| 4830951 | Naphtholactamsquaric acid dyes and optical recording materials containing these dyes | Matthias Dust, Peter Neumann, Peter Hauser, Gerhard Wagenblast, Heidi Benthack-Thoms +2 more | 1989-05-16 |
| 4806664 | Novel tetraphenyldithiolene complexes, asymmetrically substituted benzoins, and optical recording materials containing the novel complexes | Wolfgang Schrott, Peter Neumann, Bernhard Albert, Michael Thomas, Helmut Barzynski +1 more | 1989-02-21 |