Inventor · disambiguated record
Helmut Fiege
Also filed as: BAUER KURT · FIEGE HELMUT · FIEGE HELMUT DIPL CHEM DR · WEDEMEYER KARLFRIED
85 granted patents·1 pending application·587 citations·filing 1976–2003
99Inventor score
Top patents by PatentIndex Score
86 records- 0195US4820871AProcess for the preparation of N,N-diaryl-ureasBAYER AG·Filed 1987·Granted Apr 11, 1989·55 cites·10 claims
- 0294US4990707AProcess for the ring chlorination of aromatic hydrocarbonsBAYER AG·Filed 1989·Granted Feb 5, 1991·47 cites·17 claims
- 0394US4925994AProcess for the ring chlorination of aromatic hydrocarbonsBAYER AG·Filed 1989·Granted May 15, 1990·39 cites·20 claims
- 0483US4304940APreparation of 2-alkyl- and 2-aryl-thiomethylphenolsBAYER AG·Filed 1980·Granted Dec 8, 1981·17 cites·9 claims
- 0582US4929766AProcess are the preparation of p-hydroxy-benzaldehydesBAYER AG·Filed 1989·Granted May 29, 1990·17 cites·20 claims
- 0682US4358616AProcess for the preparation of alkylthiomethylphenols and arylthiomethylphenolsBAYER AG·Filed 1980·Granted Nov 9, 1982·16 cites·29 claims
- 0781US5059716AProcess for the preparation of aldehydesBAYER AG·Filed 1990·Granted Oct 22, 1991·20 cites·17 claims
- 0881US4238625AProcess for the preparation of aryloxyacetic acidBAYER AG·Filed 1979·Granted Dec 9, 1980·13 cites·19 claims
- 0980US6355827B1Process for preparing 2-cyanoindan-1-onesBAYER AG·Filed 1998·Granted Mar 12, 2002·20 cites·10 claims
- 1080US4192959AProcess for the preparation of pure 2-hydroxybenzyl alcohol, pure 4-hydroxybenzyl alcohol or a mixture of both hydroxy-benzyl alcoholsHAARMANN & REIMER GMBH·Filed 1978·Granted Mar 11, 1980·13 cites·15 claims
- 1179US4851596AProcess for nucleus-chlorination of aromatic hydrocarbonsBAYER AG·Filed 1988·Granted Jul 25, 1989·15 cites·18 claims
- 1278US4119671AProcess for the preparation of hydroxybenzaldehydesBAYER AG·Filed 1977·Granted Oct 10, 1978·11 cites·8 claims
- 1376US5384059AHeat transfer fluid and process for its preparationBAYER AG·Filed 1993·Granted Jan 24, 1995·15 cites·10 claims
- 1475US5859296AProcess for isolating hydroxypivalic acid from aqueous solutionBAYER AG·Filed 1997·Granted Jan 12, 1999·16 cites·16 claims
- 1571US5210343AProcess for the preparation of p-dichlorobenzeneBAYER AG·Filed 1992·Granted May 11, 1993·11 cites·10 claims
- 1671US4827057AProcess for preparing 1,2-dichlorobenzeneBAYER AG·Filed 1988·Granted May 2, 1989·9 cites·17 claims
- 1770US4827058AProcess for the removal of m-chlorotoluene from chlorotoluene mixturesBAYER AG·Filed 1988·Granted May 2, 1989·9 cites·20 claims
- 1869US4973759AProcess for the isolation of alkylated aromatic aminesBAYER AG·Filed 1989·Granted Nov 27, 1990·9 cites·20 claims
- 1967US5523481AProcess for the preparation of dialkyl dicarbonatesBAYER AG·Filed 1994·Granted Jun 4, 1996·11 cites·7 claims
- 2065US5585521AProcess for the preparation of alkylhydrazine saltsBAYER AG·Filed 1995·Granted Dec 17, 1996·11 cites·11 claims
- 2164US5545779AProcess for the hydrodehalogenation of halogenated benzenesBAYER AG·Filed 1994·Granted Aug 13, 1996·8 cites·10 claims
- 2264US5466881AProcess for preparing m-chloroaromaticsBAYER AG·Filed 1994·Granted Nov 14, 1995·8 cites·8 claims
- 2363US4366325AProcess for the preparation of 3-phenoxy-benzaldehydesBAYER AG·Filed 1980·Granted Dec 28, 1982·16 cites·11 claims
- 2461US5670694AProcess for the preparation of 2,4-dichloro-5-fluorobenzonitrile and 2,6-dichloro-3-fluorobenzonitrileBAYER AG·Filed 1996·Granted Sep 23, 1997·7 cites·8 claims
- 2561US5095157AProcess for the preparation of 2-chloro-4-nitro-alkylbenzeneBAYER AG·Filed 1990·Granted Mar 10, 1992·7 cites·20 claims
- 2660US5145958AProcess for the preparation of 2,4- or 2,6-dihalogeno-anilineBAYER AG·Filed 1991·Granted Sep 8, 1992·7 cites·18 claims
- 2760US5010193APreparation of phosphoric acid derivatives and intermediatesBAYER AG·Filed 1988·Granted Apr 23, 1991·5 cites·6 claims
- 2859US5659088AProcess for the preparation of 4-fluorothiophenolBAYER AG·Filed 1995·Granted Aug 19, 1997·7 cites·10 claims
- 2959US5101075AProcess for the preparation of bis-and tris-(3-dimethylaminopropyl)amineBAYER AG·Filed 1990·Granted Mar 31, 1992·6 cites·9 claims
- 3059US4150243AProcess for the dealkylation of tert.-alkyl substituted phenolsBAYER AG·Filed 1976·Granted Apr 17, 1979·5 cites·20 claims
- 3159US4144400AProcess for the continuous preparation of di-tertiary butylcresolsBAYER AG·Filed 1976·Granted Mar 13, 1979·5 cites·9 claims
- 3258US5801276AProcess for the preparation of hydroxypivalic acidBAYER AG·Filed 1997·Granted Sep 1, 1998·6 cites·4 claims
- 3358US5105036AProcess for ring-chlorination of aromatic hydrocarbonsBAYER AG·Filed 1991·Granted Apr 14, 1992·6 cites·19 claims
- 3458US4218380AProcess for the preparation of arylglyoxylic acidsBAYER AG·Filed 1979·Granted Aug 19, 1980·4 cites·31 claims
- 3556US4948886AProcess for the preparation of benzothiazepinone derivativesBAYER AG·Filed 1989·Granted Aug 14, 1990·4 cites·20 claims
- 3655US4956505AProcess for the preparation of 4,4-dimethyl-1-(p-chlorophenyl)pentan-3-oneBAYER AG·Filed 1989·Granted Sep 11, 1990·5 cites·17 claims
- 3755US4113975AProcess for purifying alkylphenolzBAYER AG·Filed 1977·Granted Sep 12, 1978·4 cites·16 claims
- 3854US5760247AProcess for the preparation of carbazoleBAYER AG·Filed 1997·Granted Jun 2, 1998·5 cites·5 claims
- 3954US5463068AProcess for desulphurizing organic mercapto and/or disulphide compoundsBAYER AG·Filed 1994·Granted Oct 31, 1995·4 cites·9 claims
- 4054US4824975AProcess for the preparation of oxetane-3-carboxylic acidsBAYER AG·Filed 1987·Granted Apr 25, 1989·4 cites·8 claims
- 4154US4238629AProcess for the preparation of a mixture of 2-and 4-hydroxybenzyl alcoholBAYER AG·Filed 1979·Granted Dec 9, 1980·3 cites·4 claims
- 4253US5475163AProcess for the preparation of 2,3-dichloro-nitrobenzeneBAYER AG·Filed 1995·Granted Dec 12, 1995·5 cites·9 claims
- 4353US5130493AProcess for the preparation of o-hydroxy-benzaldehydesBAYER AG·Filed 1991·Granted Jul 14, 1992·15 cites·11 claims
- 4452US5157170AProcess for reacting polyhalogenated aromatic compounds with monohalogenated or nonhalogenated aromatic compoundsBAYER AG·Filed 1991·Granted Oct 20, 1992·4 cites·11 claims
- 4551US5684217AProcess for preparing 3-fluoro-4,6-dichlorotolueneBAYER AG·Filed 1995·Granted Nov 4, 1997·5 cites·7 claims
- 4650US5436377AProcess for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomersBAYER AG·Filed 1994·Granted Jul 25, 1995·4 cites·11 claims
- 4749US5679826AProcess for the preparation of 2-chloroacrylonitrileBAYER AG·Filed 1996·Granted Oct 21, 1997·4 cites·10 claims
- 4849US5502256AProcess for preparing 2,2'-dinitrodiphenyl disulphideBAYER AG·Filed 1994·Granted Mar 26, 1996·4 cites·11 claims
- 4949US4871484AProcess for the preparation of 2,2-bis-chloro-methylalkanecarboxylic acid chloridesBAYER AG·Filed 1987·Granted Oct 3, 1989·3 cites·4 claims
- 5048US5756809AProcess for the preparation of (2RS,3RS)-3-(2'-aminophenylthio)-2-hydroxy-3-(4"-methoxyphenyl)-propionic acid methyl esterBAYER AG·Filed 1996·Granted May 26, 1998·3 cites·8 claims
Showing the top 50 of 86 patent records by PatentIndex Score.
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