| 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 |
