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Erftstadt, DE
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Patents Grants
last 30 patents
Information
Patent Grant
Process for purifying 1,2-dichloroethane
Patent number
7,309,804
Issue date
Dec 18, 2007
Vinnolit Technologie GmbH & Co.
Helmut Grumann
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the purification and recovery of the contaminated solut...
Patent number
5,047,377
Issue date
Sep 10, 1991
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying and recovering the contaminated catalyst solu...
Patent number
5,002,914
Issue date
Mar 26, 1991
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for removing metallic corrosion products from a contaminate...
Patent number
4,985,383
Issue date
Jan 15, 1991
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying and recovering catalyst solution contaminated...
Patent number
4,746,640
Issue date
May 24, 1988
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for separating iodine and its compounds from the carbonylat...
Patent number
4,664,753
Issue date
May 12, 1987
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying and recovering contaminated catalyst solution...
Patent number
4,629,711
Issue date
Dec 16, 1986
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for recovering noble metals belonging to group VIII of the...
Patent number
4,557,760
Issue date
Dec 10, 1985
Hoechst Aktiengesellschaft
Heinz Erpenbach
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Process for purifying and recovering contaminated catalyst solution...
Patent number
4,556,644
Issue date
Dec 3, 1985
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for making carboxylic acid halides
Patent number
4,543,217
Issue date
Sep 24, 1985
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for separating acetone from carbonylation mixtures
Patent number
4,444,624
Issue date
Apr 24, 1984
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying and recovering contaminated catalyst solution...
Patent number
4,442,304
Issue date
Apr 10, 1984
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for purifying and recovering contaminated catalyst solution...
Patent number
4,440,570
Issue date
Apr 3, 1984
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for making carboxylic acid halides
Patent number
4,414,160
Issue date
Nov 8, 1983
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of acetyl chloride
Patent number
4,352,761
Issue date
Oct 5, 1982
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Continuous production of alkyl acrylates free from ether
Patent number
4,280,010
Issue date
Jul 21, 1981
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of acetic anhydride and acetic acid from acetaldehyde
Patent number
4,252,983
Issue date
Feb 24, 1981
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Patents Applications
last 30 patents
Information
Patent Application
Process for purifying 1,2-dichloroethane
Publication number
20030055301
Publication date
Mar 20, 2003
Helmut Grumann
C07 - ORGANIC CHEMISTRY
Information
Patent Application
Method for producing 1,2-dichloroethane
Publication number
20030004380
Publication date
Jan 2, 2003
Helmut Grumann
C07 - ORGANIC CHEMISTRY