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Friedhelm Geiger
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6450 Hanau 9, DE
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last 30 patents
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Patent Grant
Process for the preparation of D,L-methionine or the salt thereof
Patent number
5,990,349
Issue date
Nov 23, 1999
Degussa Aktiengesellschaft
Friedhelm Geiger
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the preparation of D,L-methionine or the salt thereof
Patent number
5,770,769
Issue date
Jun 23, 1998
Degussa Aktiengesellschaft
Friedhelm Geiger
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the hydrolysis of 5-(.beta.-methylmercaptoethyl)-hydantoin
Patent number
4,518,801
Issue date
May 21, 1985
Rudolf Bolze
C07 - ORGANIC CHEMISTRY
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Patent Grant
Working up of the residual gases resulting from the production of c...
Patent number
4,434,148
Issue date
Feb 28, 1984
Degussa Aktiengesellschaft
Gerhard Bach
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Process for the production of aqueous sodium methioninate solutions
Patent number
4,391,987
Issue date
Jul 5, 1983
Degussa Aktiengesellschaft
Manfred Spindler
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Patent Grant
Process for the production of aqueous sodium methioninate solutions
Patent number
4,391,988
Issue date
Jul 5, 1983
Degussa Aktiengesellschaft
Manfred Spindler
A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Information
Patent Grant
Process for the production of alkyl sulfonic acids
Patent number
4,239,696
Issue date
Dec 16, 1980
Gerd Schreyer
C07 - ORGANIC CHEMISTRY