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Hans Frischkorn
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Hofheim am Taunus, DE
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last 30 patents
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Patent Grant
Bisbenzoxazolylnaphthalenes containing sulfonate or sulfonamide gro...
Patent number
4,791,205
Issue date
Dec 13, 1988
Hoechst Aktiengesellschaft
Erich Schinzel
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Mixtures of optical brighteners and their use
Patent number
4,447,350
Issue date
May 8, 1984
Hoechst Aktiengesellschaft
Thomas Martini
D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information
Patent Grant
Mixtures of optical brighteners
Patent number
4,416,795
Issue date
Nov 22, 1983
Hoechst Aktiengesellschaft
Thomas Martini
D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information
Patent Grant
Process for the preparation of naphthalene-1,4-dicarboxylic acid
Patent number
4,376,214
Issue date
Mar 8, 1983
Hoechst Aktiengesellschaft
Hans Frischkorn
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of naphthalene-1,4-dicarboxylic acid
Patent number
4,375,556
Issue date
Mar 1, 1983
Hoechst Aktiengesellschaft
Hans Frischkorn
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Colorless formulations of optical brighteners from the series of bi...
Patent number
4,271,036
Issue date
Jun 2, 1981
Hoechst Aktiengesellschaft
Klaus Uhl
D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
Information
Patent Grant
Mixture of benzoxazole derivatives
Patent number
4,110,246
Issue date
Aug 29, 1978
Hoechst Aktiengesellschaft
Hans Frischkorn
D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...