Fiege, Helmut
Patent Applications and Registrations
Patent applications and USPTO patent grants for Fiege, Helmut.The latest application filed is for "process for preparing 3,3-dimethyl-2-oxobutyric acid".
- Fiege, Helmut - Leverkusen DE
| Patent | Date |
|---|---|
| Process for preparing 3,3-dimethyl-2-oxobutyric acid App 20040030186 - Fiege, Helmut | 2004-02-12 |
| Process for preparing 2-halogenated indan-1-ones Grant 6,433,228 - Komoschinski , et al. August 13, 2 | 2002-08-13 |
| Process for preparing 2-cyanoindan-1-ones Grant 6,355,827 - Komoschinski , et al. March 12, 2 | 2002-03-12 |
| Process for isolating hydroxypivalic acid from aqueous solution Grant 5,859,296 - Neumann , et al. January 12, 1 | 1999-01-12 |
| Heat transfer fluid and process for its preparation Grant 5,384,059 - Klein , et al. January 24, 1 | 1995-01-24 |
| Process for the preparation of p-dichlorobenzene Grant 5,210,343 - Mais , et al. May 11, 1 | 1993-05-11 |
| Process for the preparation of 2-chloro-4-nitro-alkylbenzene Grant 5,095,157 - Mais , et al. March 10, 1 | 1992-03-10 |
| Process for the preparation of aldehydes Grant 5,059,716 - Joentgen , et al. October 22, 1 | 1991-10-22 |
| Process for the ring chlorination of aromatic hydrocarbons Grant 4,990,707 - Mais , et al. February 5, 1 | 1991-02-05 |
| Process for the isolation of alkylated aromatic amines Grant 4,973,759 - Klein , et al. November 27, 1 | 1990-11-27 |
| Process for the preparation of benzothiazepinone derivatives Grant 4,948,886 - Mais , et al. August 14, 1 | 1990-08-14 |
| Process are the preparation of p-hydroxy-benzaldehydes Grant 4,929,766 - Schnatterer , et al. May 29, 1 | 1990-05-29 |
| Process for the ring chlorination of aromatic hydrocarbons Grant 4,925,994 - Mais , et al. May 15, 1 | 1990-05-15 |
| Process for preparing 1,2-dichlorobenzene Grant 4,827,057 - Kasbauer , et al. May 2, 1 | 1989-05-02 |
| Process for the preparation of alkylthiomethylphenols and arylthiomethylphenols Grant 4,358,616 - Wedemeyer , et al. November 9, 1 | 1982-11-09 |
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