Helmut Fiege

Person

Leverkusen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Method for producing aryl thiols by hydrogenating diaryldisulphides
- Patent number 6,500,988
- Issue date Dec 31, 2002
- Bayer Aktiengesellschaft
- Friedrich-Wilhelm Ullrich
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-halogenated indan-1-ones
- Patent number 6,433,228
- Issue date Aug 13, 2002
- Bayer Aktiengesellschaft
- Joachim Komoschinski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 2-cyanoindan-1-ones
- Patent number 6,355,827
- Issue date Mar 12, 2002
- Bayer Aktiengesellschaft
- Joachim Komoschinski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
S-(4-biphenyl)-thiosulphuric acids and their salts, method for prod...
- Patent number 6,271,415
- Issue date Aug 7, 2001
- Bayer Aktiengesellschaft
- Friedrich-Wilhelm Ullrich
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Preparation of N-phenyl-1-naphthylamine
- Patent number 6,133,480
- Issue date Oct 17, 2000
- Bayer Aktiengesellschaft
- Horst Behre
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 4,6-diamino-resorcinol dihydrochloride
- Patent number 6,093,852
- Issue date Jul 25, 2000
- Bayer Aktiengesellschaft
- Horst Behre
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthal...
- Patent number 6,002,041
- Issue date Dec 14, 1999
- Bayer Aktiengesellschaft
- Gunter Rauchschwalbe
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Non-explosive preparations of 1-hydroxybenzotriazole
- Patent number 5,998,628
- Issue date Dec 7, 1999
- Bayer Aktiengesellschaft
- Ferdinand Hagedorn
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing N-aryl-N'-alkyl-piperazines
- Patent number 5,922,874
- Issue date Jul 13, 1999
- Bayer Atkiengesellschaft
- Joachim Komoschinski
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the purification of phosphorus oxychloride
- Patent number 5,911,962
- Issue date Jun 15, 1999
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for decarboxylation of halogenated aromatic carboxylic acids
- Patent number 5,872,283
- Issue date Feb 16, 1999
- Bayer Aktiengesellschaft
- Stefan Antons
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-amino-6-chlorophenyl-alkylsulfanes...
- Patent number 5,872,300
- Issue date Feb 16, 1999
- Bayer Aktiengesellschaft
- Ferdinand Hagedorn
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of alkyl aryl ethers containing carboxy...
- Patent number 5,869,735
- Issue date Feb 9, 1999
- Bayer Aktiengesellschaft
- Stefan Antons
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for isolating hydroxypivalic acid from aqueous solution
- Patent number 5,859,296
- Issue date Jan 12, 1999
- Bayer Aktiengesellschaft
- Karl Heinz Neumann
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-chloro-4-methylphenol
- Patent number 5,847,236
- Issue date Dec 8, 1998
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 4-hydroxybiphenyl
- Patent number 5,847,234
- Issue date Dec 8, 1998
- Bayer Aktiengesellschaft
- Horst Behre
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid
- Patent number 5,808,141
- Issue date Sep 15, 1998
- Bayer Aktiengesellschaft
- Albert Schnatterer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of hydroxypivalic acid
- Patent number 5,801,276
- Issue date Sep 1, 1998
- Bayer Aktiengesellschaft
- Karl-Heinz Neumann
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Hydrogenation of halonitroaromatic compounds
- Patent number 5,801,284
- Issue date Sep 1, 1998
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 5-hydroxymethylthiazole
- Patent number 5,780,638
- Issue date Jul 14, 1998
- Bayer Aktiengesellschaft
- Helmut Kraus
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the recovery of 4-hydroxybenzaldehyde from reaction mix...
- Patent number 5,773,664
- Issue date Jun 30, 1998
- Bayer Aktiengesellschaft
- Albert Schnatterer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of carbazole
- Patent number 5,760,247
- Issue date Jun 2, 1998
- Bayer Aktiengesellschaft
- Albert Schnatterer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of (2RS,3RS)-3-(2'-aminophenylthio)-2-h...
- Patent number 5,756,809
- Issue date May 26, 1998
- Bayer Aktiengesellschaft
- Ferdinand Hagedorn
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 3-chloro-3'-Nitro-4'-Methoxybenzophe...
- Patent number 5,741,936
- Issue date Apr 21, 1998
- Bayer Aktiengesellschaft
- Klaus-Christian Paetz
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing 3-fluoro-4,6-dichlorotoluene
- Patent number 5,684,217
- Issue date Nov 4, 1997
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-chloroacrylonitrile
- Patent number 5,679,826
- Issue date Oct 21, 1997
- Bayer Aktiengesellschaft
- Franz-Josef Mais
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of N-arylaminoacrylic acid derivatives...
- Patent number 5,672,708
- Issue date Sep 30, 1997
- Bayer Aktiengesellschaft
- Gunter Rauchschwalbe
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of isobenzofurandiones
- Patent number 5,672,719
- Issue date Sep 30, 1997
- Bayer Aktiengesellschaft
- Josef Kasbauer
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile an...
- Patent number 5,670,694
- Issue date Sep 23, 1997
- Bayer Aktiengesellschaft
- Ferdinand Hagedorn
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 4-fluorothiophenol
- Patent number 5,659,088
- Issue date Aug 19, 1997
- Bayer Aktiengesellschaft
- Helmut Fiege
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
Process for preparing 3,3-dimethyl-2-oxobutyric acid
- Publication number 20040030186
- Publication date Feb 12, 2004
- Helmut Fiege
- C07 - ORGANIC CHEMISTRY

Helmut Fiege

Person

Patents Grantslast 30 patents

Method for producing aryl thiols by hydrogenating diaryldisulphides

Process for preparing 2-halogenated indan-1-ones

Process for preparing 2-cyanoindan-1-ones

S-(4-biphenyl)-thiosulphuric acids and their salts, method for prod...

Preparation of N-phenyl-1-naphthylamine

Process for preparing 4,6-diamino-resorcinol dihydrochloride

Process for preparing di-C.sub.1 - C.sub.4 -alkyl 5-nitro-isophthal...

Non-explosive preparations of 1-hydroxybenzotriazole

Process for preparing N-aryl-N'-alkyl-piperazines

Process for the purification of phosphorus oxychloride

Process for decarboxylation of halogenated aromatic carboxylic acids

Process for the preparation of 2-amino-6-chlorophenyl-alkylsulfanes...

Process for the preparation of alkyl aryl ethers containing carboxy...

Process for isolating hydroxypivalic acid from aqueous solution

Process for the preparation of 2-chloro-4-methylphenol

Process for the preparation of 4-hydroxybiphenyl

Process for preparing 4,4'-dinitrostilbene-2,2'-disulphonic acid

Process for the preparation of hydroxypivalic acid

Hydrogenation of halonitroaromatic compounds

Process for the preparation of 5-hydroxymethylthiazole

Process for the recovery of 4-hydroxybenzaldehyde from reaction mix...

Process for the preparation of carbazole

Process for the preparation of (2RS,3RS)-3-(2'-aminophenylthio)-2-h...

Process for the preparation of 3-chloro-3'-Nitro-4'-Methoxybenzophe...

Process for preparing 3-fluoro-4,6-dichlorotoluene

Process for the preparation of 2-chloroacrylonitrile

Process for the preparation of N-arylaminoacrylic acid derivatives...

Process for the preparation of isobenzofurandiones

Process for the preparation of 2,4-dichloro-5-fluorobenzonitrile an...

Process for the preparation of 4-fluorothiophenol

Patents Applicationslast 30 patents

Process for preparing 3,3-dimethyl-2-oxobutyric acid