Steffen; Klaus-Dieter
Patent Applications and Registrations
Patent applications and USPTO patent grants for Steffen; Klaus-Dieter.The latest application filed is for "process for preparing malonic acid and alkylmalonic acids".
- Steffen; Klaus-Dieter - Hennef DE
- Steffen; Klaus-Dieter - Troisdorf Oberlar DT
- Steffen; Klaus-Dieter - Troisdorf-Oberlar DT
| Patent | Date |
|---|---|
| Process for preparing malonic acid and alkylmalonic acids Grant 5,886,219 - Steffen March 23, 1 | 1999-03-23 |
| Dialkyl 2-haloethyl malonates Grant 5,569,780 - Steffen October 29, 1 | 1996-10-29 |
| Process for preparing dialkyl 2-haloethyl malonates Grant 5,463,111 - Steffen October 31, 1 | 1995-10-31 |
| Process for the preparation of organosilanes containing methacryloyloxy or acryloyloxy groups Grant 5,117,027 - Bernhardt , et al. May 26, 1 | 1992-05-26 |
| Method of preparing quinolines, naphthyridines and other nitrogen bi-heterocyclic compounds Grant 4,380,632 - Steffen April 19, 1 | 1983-04-19 |
| Preparation of high-molecular weight thermoplastic polyorganosilicic acid esters Grant 4,026,827 - Steffen May 31, 1 | 1977-05-31 |
| Method of preparing alkylalkoxysilanes containing polysulfide bridges Grant 3,946,059 - Janssen , et al. March 23, 1 | 1976-03-23 |
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