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Otto Arndt
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Hofheim, DE
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last 30 patents
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Patent Grant
Process for the preparation of 2,5-di-phenylamino-terephthalic acid...
Patent number
5,616,779
Issue date
Apr 1, 1997
Hoechst AG
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 2-fluorophenylhydrazine
Patent number
5,599,992
Issue date
Feb 4, 1997
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of tetrachloro-1,4-benzoquinone
Patent number
5,559,257
Issue date
Sep 24, 1996
Hoechst A G
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of tetrachloro-1,4-benzoquinone
Patent number
5,525,744
Issue date
Jun 11, 1996
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of crystalline, salt-free, chlorine-sub...
Patent number
5,451,699
Issue date
Sep 19, 1995
Hoechst AG
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process of the preparation of 2,5-di-phenylamino-terephthalic acid...
Patent number
5,347,038
Issue date
Sep 13, 1994
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 2,5-di(phenylamino)-terephthalic aci...
Patent number
5,208,365
Issue date
May 4, 1993
Hoechst Aktiengesellschaft
Hermann Fuchs
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of high-purity tetrachloro-1,4-benzoquinone
Patent number
5,151,532
Issue date
Sep 29, 1992
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of high-purity tetrachloro-1,4-benzoquinone
Patent number
5,149,850
Issue date
Sep 22, 1992
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Single-vessel process for preparing 2-acetaminonaphthalene-6-sulfon...
Patent number
4,908,478
Issue date
Mar 13, 1990
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of naphthostyril
Patent number
4,824,962
Issue date
Apr 25, 1989
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 2,6-dichlorobenzoxazole
Patent number
4,658,034
Issue date
Apr 14, 1987
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 6-chloro-2,4-dinitroaniline
Patent number
4,613,698
Issue date
Sep 23, 1986
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 2,6-dichloro-4-nitroaniline
Patent number
4,605,767
Issue date
Aug 12, 1986
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Solvated salts of dinitrophenylcyanamides, and a process for the pr...
Patent number
4,552,970
Issue date
Nov 12, 1985
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of 6-chloro-2,4-dinitrophenol
Patent number
4,540,832
Issue date
Sep 10, 1985
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of N-acetylaminoarylsulfonic acids in s...
Patent number
4,487,725
Issue date
Dec 11, 1984
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
N-Nitroaryl-N-halosulfonyl ureas
Patent number
4,316,861
Issue date
Feb 23, 1982
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the manufacture of 4-nitro-4'-amino-diphenylamine-2-sul...
Patent number
4,254,054
Issue date
Mar 3, 1981
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Diaminophenyl ureas
Patent number
4,246,196
Issue date
Jan 20, 1981
Hoechst AG.
Otto Arndt
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of isomer-free toluene-4-sulfonic acid
Patent number
4,242,275
Issue date
Dec 30, 1980
Hoechst Aktiengesellschaft
Otto Arndt
C07 - ORGANIC CHEMISTRY