Siegbert Rittner

Person

Morfelden-Walldorf, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of 2-hydroxynaphthalene-6-carboxylic acid
- Patent number 5,808,142
- Issue date Sep 15, 1998
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of aromatic hydroxy carboxylic acids
- Patent number 5,643,494
- Issue date Jul 1, 1997
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for releasing acidic organic compounds from salts thereof b...
- Patent number 5,543,564
- Issue date Aug 6, 1996
- Hoechst Aktiengesellschaft
- J urgen Kulpe
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for preparing aromatic hydroxycarboxylic acids
- Patent number 5,532,406
- Issue date Jul 2, 1996
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating and purifying substances by crystallization...
- Patent number 5,447,541
- Issue date Sep 5, 1995
- Hoechst Aktiengesellschaft
- Rudolf Steiner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating and purifying substances by crystallization...
- Patent number 5,447,542
- Issue date Sep 5, 1995
- Hoechst Aktiengesellschaft
- Rudolf Steiner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for purifying fatty acid amides
- Patent number 5,419,815
- Issue date May 30, 1995
- Hoechst AG
- Norbert Doerpinghaus
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of pure trioxane
- Patent number 5,401,859
- Issue date Mar 28, 1995
- Hoechst AG
- Karl Muck
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of 2-hydroxy-naphthalene-6-carboxylic acid
- Patent number 5,312,976
- Issue date May 17, 1994
- Hoechst Aktiengesellschaft
- Volker Hautzel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Corrosion and heat-resistant ordered packing for mass transfer and...
- Patent number 5,281,479
- Issue date Jan 25, 1994
- Sigri Great Lakes Carbon GmbH
- Siegbert Rittner
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum...
- Patent number 5,271,811
- Issue date Dec 21, 1993
- Hoechst Celanese Corporation
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Separation of m- and p-dichlorobenzene
- Patent number 5,152,875
- Issue date Oct 6, 1992
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the purification of 4-acetoxystyrene
- Patent number 5,136,083
- Issue date Aug 4, 1992
- Hoechst Celanese Corporation
- Jack Chosnek
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Dioxane adducts of aromatic meta- or para-hydroxy-carboxlic acids
- Patent number 5,081,263
- Issue date Jan 14, 1992
- Hoechst Aktiengesellschaft
- von Helmold Plessen
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of a dioxane adduct of 2-hydroxynaphtha...
- Patent number 5,047,558
- Issue date Sep 10, 1991
- Hoechst Aktiengesellschaft
- Helmold von Plessen
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the separation and recovery of naphthalene-sulfonic aci...
- Patent number 5,028,736
- Issue date Jul 2, 1991
- Hoechst Aktiengesellschaft
- Ulrich Girrbach
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating off enol ethers from reaction mixtures conta...
- Patent number 5,013,444
- Issue date May 7, 1991
- Hoechst Aktiengesellschaft
- Hilmar Mildenberger
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid and proces...
- Patent number 4,925,959
- Issue date May 15, 1990
- Hoechst Aktiengesellschaft
- Helmold von Plessen
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating organic constituents from waste gases of the...
- Patent number 4,923,485
- Issue date May 8, 1990
- Hoechst Aktiengesellschaft
- Ernst Horoldt
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Process for the preparation of pure crotonic acids
- Patent number 4,918,225
- Issue date Apr 17, 1990
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid
- Patent number 4,916,257
- Issue date Apr 10, 1990
- Hoechst Aktiengesellschaft
- Helmold von Plessen
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for removing halogenated hydroxyaromatics from aqueous solu...
- Patent number 4,864,065
- Issue date Sep 5, 1989
- Hoechst Aktiengesellschaft
- Bernhard Wojtech
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Process for extracting nitrohydroxyaromatics from aqueous solutions
- Patent number 4,814,518
- Issue date Mar 21, 1989
- Hoechst Aktiengesellschaft
- Helmut Gossel
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for separating dimethyl isophthalate and dimethyl orthophth...
- Patent number 4,683,034
- Issue date Jul 28, 1987
- Hoechst Aktiengesellschaft
- Rolf Bader
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for improving the wetting characteristics of the surface of...
- Patent number 4,617,197
- Issue date Oct 14, 1986
- Hoechst Aktiengesellschaft
- Siegbert Rittner
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Siegbert Rittner

Person

Patents Grantslast 30 patents

Process for the preparation of 2-hydroxynaphthalene-6-carboxylic acid

Process for the preparation of aromatic hydroxy carboxylic acids

Process for releasing acidic organic compounds from salts thereof b...

Process for preparing aromatic hydroxycarboxylic acids

Process for separating and purifying substances by crystallization...

Process for separating and purifying substances by crystallization...

Process for purifying fatty acid amides

Process for the preparation of pure trioxane

Process for the preparation of 2-hydroxy-naphthalene-6-carboxylic acid

Corrosion and heat-resistant ordered packing for mass transfer and...

Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum...

Separation of m- and p-dichlorobenzene

Process for the purification of 4-acetoxystyrene

Dioxane adducts of aromatic meta- or para-hydroxy-carboxlic acids

Process for the preparation of a dioxane adduct of 2-hydroxynaphtha...

Process for the separation and recovery of naphthalene-sulfonic aci...

Process for separating off enol ethers from reaction mixtures conta...

Dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid and proces...

Process for separating organic constituents from waste gases of the...

Process for the preparation of pure crotonic acids

Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid

Process for removing halogenated hydroxyaromatics from aqueous solu...

Process for extracting nitrohydroxyaromatics from aqueous solutions

Process for separating dimethyl isophthalate and dimethyl orthophth...

Process for improving the wetting characteristics of the surface of...