Hahnke; Manfred
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hahnke; Manfred.The latest application filed is for "blue azo dyestuff mixture for strong blue color on hydrophobic fibers".
- Hahnke; Manfred - Kelkheim DE
| Patent | Date |
|---|---|
| Blue azo dyestuff mixture for strong blue color on hydrophobic fibers Grant 5,071,443 - Buhler , et al. December 10, 1 | 1991-12-10 |
| Mixtures of water-soluble fiber-reactive dyes and use thereof for dyeing: dioxazine and disazo dyes Grant 4,705,524 - Hahnke , et al. November 10, 1 | 1987-11-10 |
| Mixtures of monoazo dyestuffs Grant 4,582,509 - Buhler , et al. April 15, 1 | 1986-04-15 |
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