Patents per Year
Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5053524 | 3-aminophenylpentane-1,5-diones | Friedrich-Wilhelm Raulfs, Udo Mayer | 1991-10-01 |
| 4966983 | Benzopyrans for use in recording systems | Andreas Guentner, Udo Mayer | 1990-10-30 |
| 4958021 | Benzopyran derivatives | Andreas Guentner, Udo Mayer | 1990-09-18 |
| 4935059 | Basic rhodamine dyes | Udo Mayer | 1990-06-19 |
| 4841050 | Carbazole containing benzopyrans | Andreas Guentner, Udo Mayer | 1989-06-20 |
| 4717423 | Mixtures of dye precursors, and pressure-sensitive recording material containing these mixtures | Rainer Dyllick-Brenzinger, Udo Mayer | 1988-01-05 |
| 4647675 | Rhodamine dyes | Udo Mayer | 1987-03-03 |
| 4611070 | Spirodibenzopyrans | — | 1986-09-09 |
| 4603202 | Fluoran colorants for recording systems | Udo Mayer | 1986-07-29 |
| 4345073 | 7,7'-Diamino derivatives of 2,2'-spirodibenzopyranes | Hans-Peter Baumann | 1982-08-17 |
| 4316027 | 7,7'-Diamino derivatives of 2,2'-spirodibenzopyranes | Hans-Peter Baumann | 1982-02-16 |