Membership
Tour
Register
Log in
Klaus Gehrmann
Follow
Person
Erftstadt, DE
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Process for the preparation of acetic acid and acetic anhydride
Patent number
5,380,929
Issue date
Jan 10, 1995
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for separating iodine and its compounds from the products o...
Patent number
5,169,982
Issue date
Dec 8, 1992
Hoechst Aktiengesellschaft
Erpenbach Heinz
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of phenylalanine n-propyl ester hydroch...
Patent number
4,898,966
Issue date
Feb 6, 1990
Hoechst Aktiengesellschaft
Heinz Erpenbach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of n-acetylphenylalanine
Patent number
4,892,971
Issue date
Jan 9, 1990
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 removing acetone from reaction mixtures of carbonylatio...
Patent number
4,717,454
Issue date
Jan 5, 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 the continuous production of 2-carboxyethyl-alkyl-phosp...
Patent number
4,560,518
Issue date
Dec 24, 1985
Hoechst Aktiengesellschaft
Klaus Gehrmann
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 alkanephosphonous acid esters
Patent number
4,549,995
Issue date
Oct 29, 1985
Hoechst Aktiengesellschaft
Eberhard Auer
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for separating the catalyst system from the reaction mixtur...
Patent number
4,549,937
Issue date
Oct 29, 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 making methyldichlorophosphane
Patent number
4,518,538
Issue date
May 21, 1985
Hoechst Aktiengesellschaft
Klaus Gehrmann
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
Production of acetic anhydride
Patent number
4,430,273
Issue date
Feb 7, 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
Process for making anhydrous alkyl iodides
Patent number
4,351,972
Issue date
Sep 28, 1982
Hoechst Aktiengesellschaft
Hans K. Kubbeler
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of acetic anhydride
Patent number
4,333,884
Issue date
Jun 8, 1982
Hoechst Aktiengesellschaft
Hans-Klaus Kubbeler
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of 1,1-diacetoxyethane
Patent number
4,319,038
Issue date
Mar 9, 1982
Hoechst Aktiengesellschaft
Hans-Klaus Kubbeler
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Production of 2-chloroformylethylmethylphosphinic acid chlorides
Patent number
4,318,865
Issue date
Mar 9, 1982
Hoechst Aktiengesellschaft
Alexander Ohorodnik
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Carrier-supported catalyst and process for making it
Patent number
4,308,175
Issue date
Dec 29, 1981
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
Process permitting the deposition of solid matter in mixtures conta...
Patent number
4,261,923
Issue date
Apr 14, 1981
Hoechst Aktiengesellschaft
Alexander Ohorodnik
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Carrier-supported catalyst and process for making it
Patent number
4,260,520
Issue date
Apr 7, 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