Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4965346 | Heterocyclic azo dyes containing cyanothiophene derivatives as diazo components and diaminopyridines as coupling components | Gunther Lamm, Hermann Loeffler | 1990-10-23 |
| 4855412 | Diaminopyridine azo dyes having acyloxy radicals substituted on the diaminopyridine | Gunther Lamm, Hermann Loeffler | 1989-08-08 |
| 4855413 | Heterocyclic azo dyes containing cyanothiophene derivatives as diazo components and diaminopyridines as coupling components | Gunther Lamm, Hermann Loeffler | 1989-08-08 |
| 4724259 | Azo dyes and liquid-crystalline materials containing these dyes | Karl-Heinz Etzbach, Werner Juenemann | 1988-02-09 |
| 4650860 | Benzisothiazolazo, diaminopyridine dyes | Gunther Lamm | 1987-03-17 |
| 4599402 | Metal complex dyes containing azo azomethine groups | Werner Junemann | 1986-07-08 |
| 4430267 | Metal complex dyes derived from 4-phenylazo-5-aminopyrazoles | — | 1984-02-07 |
| 4424154 | Azo dye having a 3-cyano- or 3-carbamoyl-2,6-diaminopyridine coupling component | Hermann Lo/ ffler, Gunther Lamm | 1984-01-03 |
| 4419290 | Diazo dyes having a coupler component attached to a sulfaphenyl-azo-phenyl-azo-radical | Hermann Loeffler | 1983-12-06 |
| 4344880 | Disazo dyestuffs having an acylamino group and an aromatic-oxy group on different terminal moieties | Werner Juenemann | 1982-08-17 |
| 4315756 | Oil-soluble azo dye with N-substituted .beta.-naphthylamine as coupling component | Georg Zeidler, Guenter Hansen, Guenther Riedel | 1982-02-16 |
| 4285693 | Dyeing of surface coatings, organic solvents and petroleum products | Guenther Lamm | 1981-08-25 |
| 4231746 | Dyeing of cellulose-containing textile material and novel dyes for use therein | Werner Juenemann | 1980-11-04 |
| 4210583 | Azo dyes of the 2,6-di(substituted) amino pyridine series | Walter Kurtz, Gunther Lamm | 1980-07-01 |
| 4203894 | Azo dyes containing sulfonic acid groups and oxdiazolyl radicals | Walter Kurtz | 1980-05-20 |