Schefczik; Ernst
Patent Applications and Registrations
Patent applications and USPTO patent grants for Schefczik; Ernst.The latest application filed is for "[1,3,4] triazolo [1,5-a] pyridines".
- Schefczik; Ernst - Ludwigshafen DE
| Patent | Date |
|---|---|
| [1,3,4] Triazolo [1,5-A] pyridines Grant 6,043,369 - Schefczik March 28, 2 | 2000-03-28 |
| Azo dyestuffs containing a diazo component from the aniline series and coupling component from the triazolopyridine series Grant 5,608,041 - Schefczik , et al. March 4, 1 | 1997-03-04 |
| N-aminopyridone dyes Grant 5,580,980 - Etzbach , et al. December 3, 1 | 1996-12-03 |
| Acylamino-substituted isoxazole or isothiazole derivatives, their preparation and their use Grant 5,538,939 - Muenster , et al. July 23, 1 | 1996-07-23 |
| Naphtholactam dyes and optical recording medium containing these dyes Grant 4,939,012 - Dust , et al. July 3, 1 | 1990-07-03 |
| Navy and black dye mixtures: thiophene azo disperse dye and red, yellow or orange disperse dye Grant 4,908,041 - Hahn , et al. March 13, 1 | 1990-03-13 |
| Isothiazolylazo dyes Grant 4,774,324 - Loeffler , et al. September 27, 1 | 1988-09-27 |
| Disperse Quinophthalone Dyes Containing A Carboxylic Ester Group Grant 3,622,582 - Schefczik November 23, 1 | 1971-11-23 |
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