Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5332861 | Process for preparing distyrylbiphenyl compounds | — | 1994-07-26 |
| 5152922 | 1,4-distyrylbenzene compounds and mixtures thereof with other 1,4-distyrybenzene compounds | Hans R. Meyer | 1992-10-06 |
| 5072016 | Mixtures of fluorescent whitening agents | Hans R. Meyer, Dieter Reinehr, Kurt Weber | 1991-12-10 |
| 5041632 | Process for the preparation of 4,4'-dinitrostilbene-2,2-disulfonic acid | — | 1991-08-20 |
| 5001253 | Fluorescent brighteners consisting of bis-styrylbenzene compounds, a process for their preparation and their use | — | 1991-03-19 |
| 4891153 | Mixtures of fluorescent whitening agents | Hans R. Meyer, Dieter Reinehr, Kurt Weber | 1990-01-02 |
| 4867906 | Mixtures of fluorescent whitening agents | Hans R. Meyer, Dieter Reinehr, Kurt Weber | 1989-09-19 |
| 4785128 | Process for the preparation of bis-styrylbenzenes | — | 1988-11-15 |
| 4778622 | Mixtures of fluorescent whitening agents | Hans R. Meyer, Dieter Reinehr, Kurt Weber | 1988-10-18 |
| 4778623 | Fluorescent brighteners consisting of bis-styrylbenzene compounds, a process for their preparation and their use | — | 1988-10-18 |
| 4719051 | Process for the preparation of 4,4'-dinitrostilbene-2,2'-disulfonic acid and its salts | — | 1988-01-12 |
| 4539161 | Amine oxide compounds | — | 1985-09-03 |
| 4508784 | 4-Styryl-4'-vinylbiphenyls, the production thereof and use thereof as fluorescent | — | 1985-04-02 |
| 4267343 | Process for the manufacture of 2,5-bis-(benzoxazolyl)-thiophene compounds | — | 1981-05-12 |
| 4249022 | Process for the manufacture of 1,4-disubstituted bicyclic or tricyclic compounds and new 1,4-disubstituted bicyclic compounds | — | 1981-02-03 |
| 4245007 | 1,4-Bis-[azol-2'-yl]-naphthalenes and process of using the same | — | 1981-01-13 |