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Hurth, DE
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last 30 patents
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Patent Grant
Process for the preparation of crystalline sodium silicates having...
Patent number
5,211,930
Issue date
May 18, 1993
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of crystalline sodium silicates
Patent number
5,183,651
Issue date
Feb 2, 1993
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for inhibiting and destroying peroxides in dialkyl ethers
Patent number
5,166,452
Issue date
Nov 24, 1992
Hoechst Aktiengesellschaft
Reinhard Gradl
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for producing ammonium polyphosphate
Patent number
5,165,904
Issue date
Nov 24, 1992
Hoechst Aktiengesellschaft
Thomas Staffel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for removing metallic corrosion products from carbonylation...
Patent number
5,124,290
Issue date
Jun 23, 1992
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of alkali metal phosphate solutions
Patent number
5,124,137
Issue date
Jun 23, 1992
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for the isolation of vinyl acetate by distillation
Patent number
5,066,365
Issue date
Nov 19, 1991
Hoechst Aktiengesellschaft
Gunter Roscher
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for making phosphoric acid free from titanium
Patent number
4,806,324
Issue date
Feb 21, 1989
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for making crude phosphoric acid
Patent number
4,780,294
Issue date
Oct 25, 1988
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for working up heavy metal-containing residues originally f...
Patent number
4,762,693
Issue date
Aug 9, 1988
Hoechst Aktiengesellschaft
Gunther Schimmel
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for purifying phosphoric acid
Patent number
4,713,229
Issue date
Dec 15, 1987
Hoechst Aktiengesellschaft
Gunther Schimmel
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for reducing the reactivity and improving the flow behavior...
Patent number
4,705,529
Issue date
Nov 10, 1987
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for making wet-process phosphoric acid
Patent number
4,683,127
Issue date
Jul 28, 1987
Hoechst Aktiengesellschaft
Friedrich Kolkmann
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for making an alkali phosphate solution
Patent number
4,678,650
Issue date
Jul 7, 1987
Hoechst Aktiengesellschaft
Reinhard Gradl
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for dearsenifying phosphoric acid solutions
Patent number
4,668,492
Issue date
May 26, 1987
Hoechst Aktiengesellschaft
G/u/ nther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for making alkali metal phosphate solutions containing litt...
Patent number
4,640,824
Issue date
Feb 3, 1987
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for decontaminating phosphoric acid
Patent number
4,629,614
Issue date
Dec 16, 1986
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for defluorinating alkali metal phosphate solutions
Patent number
4,620,966
Issue date
Nov 4, 1986
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying wet-processed phosphoric acid
Patent number
4,556,548
Issue date
Dec 3, 1985
Hoechst Aktiengesellschaft
Reinhard Gradl
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for reducing the fluorine content in wet-processed phosphor...
Patent number
4,540,557
Issue date
Sep 10, 1985
Hoechst Aktiengesellschaft
Reinhard Gradl
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for removing organic contaminants from wet-processed phosph...
Patent number
4,540,558
Issue date
Sep 10, 1985
Hoechst Aktiengesellschaft
Reinhard Gradl
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for removing fluorine and organic compounds from prepurifie...
Patent number
4,539,192
Issue date
Sep 3, 1985
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for extracting heavy metal ions from aqueous solutions
Patent number
4,503,016
Issue date
Mar 5, 1985
Hoechst Aktiengesellschaft
G/u/ nther Schimmel
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for the separation of heavy metal compounds from phosphoric...
Patent number
4,479,924
Issue date
Oct 30, 1984
Hoechst Aktiengesellschaft
Helmold von Plessen
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for removing heavy metal ions and arsenic from wet-processe...
Patent number
4,466,948
Issue date
Aug 21, 1984
Hoechst Aktiengesellchaft
Gunther Schimmel
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Recovery of uranium from wet-process phosphoric acid
Patent number
4,460,549
Issue date
Jul 17, 1984
Hoechst Aktiengesellschaft
Gunther Schimmel
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for after-treating extraction residues originating from the...
Patent number
4,457,848
Issue date
Jul 3, 1984
Hoechst Aktiengesellschaft
Gunther Schimmel
C01 - INORGANIC CHEMISTRY
Information
Patent Grant
Process for removing heavy metal ions from wet-processed phosphoric...
Patent number
4,452,768
Issue date
Jun 5, 1984
Hoechst Aktiengesellschaft
Reinhard Gradl
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Multistage column for countercurrent extraction of liquids
Patent number
4,444,729
Issue date
Apr 24, 1984
Hoechst Aktiengesellschaft
Reinhard Gradl
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Purification of wet-process phosphoric acid
Patent number
4,346,066
Issue date
Aug 24, 1982
Hoechst Aktiengesellschaft
Reinhard Gradl
C01 - INORGANIC CHEMISTRY