Inventor

SIEGEL HARDO

DE62 patents

Patents

50 patents

US5101045AMar 31, 1992

Substituted 4-methyl-4,7-dihydro-1,3-dioxepins, their preparation and their use as scents

BASF AG14 citations74

US4654073AMar 31, 1987

Cyclohexane-1,3-dione derivatives and their use for controlling undesirable plant growth

BASF AG8 citations74

US4113781ASep 12, 1978

Phenylpropanals

BASF AG16 citations74

US3966827AJun 29, 1976

Production of 3-methylpentane-1,5-diol

BASF AG8 citations74

US6140428AOct 31, 2000

Simultaneous production of dicarboxylic acids and diamines by splitting polyamides into their monomeric constituents

BASF AG7 citations73

US5208333AMay 4, 1993

(2r)-1-(aryloxy)-3-(butyryloxy)-2-propanols

BASF AG15 citations73

US4539081ASep 3, 1985

Preparation of benzaldehyde dialkyl acetals

BASF AG11 citations73

US4013684AMar 22, 1977

Preparation of 2,5-dimethylfuran-3-carboxylic amides

BASF AG7 citations73

US3996246ADec 7, 1976

Resolution of racemic pantolactone

BASF AG11 citations73

US5254711AOct 19, 1993

Continuous preparation of 3-cyano-3,5,5-trimethylcyclohexanone

BASF AG6 citations72

US4284825AAug 18, 1981

4-Substituted benzaldehyde-dialkylacetal

BASF AG12 citations72

US4820389AApr 11, 1989

Novel benzaldehyde dialkyl acetals and preparation and use thereof

BASF AG6 citations70

US5296363AMar 22, 1994

Preparation of 2-(4-hydroxyphenoxy)propionic acid by fermentation

BASF AG6 citations69

US5136089AAug 4, 1992

Acylation of alkyl aromatic hydrocarbons

BASF AG4 citations63

US4914133AApr 3, 1990

Amino compounds and fungicides containing them

BASF AG3 citations63

US4906758AMar 6, 1990

Preparation of pyrroles from dialkoxytetrahydrofurans

BASF AG2 citations63

US4758548AJul 19, 1988

Novel aliphatic aldehydes and their preparation

BASF AG4 citations63

US4740237AApr 26, 1988

Cyclohexane-1,3-dione derivatives and their use for controlling undesirable plant growth

BASF AG4 citations63

US4707302ANov 17, 1987

2-substituted 4,4,7,7-tetramethyl-1,3-dioxacycloheptanes, preparation and use thereof as scents

BASF AG2 citations63

US4513150AApr 23, 1985

Preparation of but-2-ene-1,4-diones substituted in the 1,4-positions

BASF AG2 citations63

US4327090AApr 27, 1982

Oximinophosphoric acid derivatives, their preparation and their use in pest control

BASF AG2 citations63

US4235683ANov 25, 1980

Electrolytic preparation of benzaldehydes

BASF AG5 citations63

US4138542AFeb 6, 1979

Polymers which contain 2-(4-methyl-cyclohex-3-en-1-yl)-propyl-N-acrylamide or -N-methacrylamide groups

BASF AG5 citations63

US5527966AJun 18, 1996

Preparation of triphenylphosphine

BASF AG6 citations62

US5496958AMar 5, 1996

Preparation of 5-vinylpyrrolidones

BASF AG4 citations62

US4967013AOct 30, 1990

Preparation of hydroxybenzaldehydes

BASF AG4 citations62

US4837201AJun 6, 1989

4-Methyl-4-phenyl-1-pentanals, their preparation and their use as scents

BASF AG3 citations62

US4707549ANov 17, 1987

Preparation of esters of optically active 2-arylalkanoic acids

BASF AG4 citations62

US4410734AOct 18, 1983

Optically active phenylpropane derivatives, their preparation and their use for the preparation of fungicides

BASF AG3 citations62

US4298438ANov 3, 1981

Preparation of 4-tert.-butylbenzaldehyde

BASF AG4 citations62

US4081477AMar 28, 1978

Pinane derivatives

BASF AG3 citations62

US5359082AOct 25, 1994

Preparation of 4-substituted imidazoles from N-formyl-α-aminonitrile

BASF AG3 citations61

US4962231AOct 9, 1990

Preparation of D- or L-alanine or high enantiomeric purity

BASF AG3 citations61

US4350641ASep 21, 1982

4-Tert.-butoxyphenylglycinonitrile and the preparation of D-(-)- and L-(+)-4-hydroxyphenylglycine

BASF AG5 citations61

US4853481AAug 1, 1989

Preparation of alkyl-substituted aromatic ketones

BASF AG4 citations60

US4418146ANov 29, 1983

Preparation of D-N-carbamyl-α-aminoacids and micro-organisms for carrying out this preparation

BASF AG4 citations58

US4350636ASep 21, 1982

Preparation of phenylacetonitriles carrying basic substituents

BASF AG6 citations58

US4761489AAug 2, 1988

Substituted 5-formyl-1,3-dioxepans

BASF AG5 citations57

US4330484AMay 18, 1982

Diastereomeric salts of malic acid and 2-aminobutanol, and process for the resolution of rademis maic acid

BASF AG5 citations57

US6013803AJan 11, 2000

Sterically hindered 4-amino-piperidine with a low dimer content, its production and use

BASF AG1 citations52

US6011157AJan 4, 2000

Process for purifying sterically hindered 4-amino piperidines

BASF AG1 citations52

Showing the top 50 of 62 patents by PatentIndex Score.

SIEGEL HARDO

Patents

Preparation of n-substituted pyrrolidones

Acylation of aromatics

Cyclohexanedione derivatives, their preparation and herbicides containing them

Preparation of optically pure D- and L- lactic acid

Preparation of tertiary amine oxides

Preparation of 2-methyl-1,4-butanediol and 3-methyltetrahydrofuran

Preparation of 1,4-alkylenediamines

Process for the preparation of amines

Polytetrahydrofuran derivatives having terminal aromatic groups

Substituted 4-methyl-4,7-dihydro-1,3-dioxepins, their preparation and their use as scents

Cyclohexane-1,3-dione derivatives and their use for controlling undesirable plant growth

Phenylpropanals

Production of 3-methylpentane-1,5-diol

Simultaneous production of dicarboxylic acids and diamines by splitting polyamides into their monomeric constituents

(2r)-1-(aryloxy)-3-(butyryloxy)-2-propanols

Preparation of benzaldehyde dialkyl acetals

Preparation of 2,5-dimethylfuran-3-carboxylic amides

Resolution of racemic pantolactone

Continuous preparation of 3-cyano-3,5,5-trimethylcyclohexanone

4-Substituted benzaldehyde-dialkylacetal

Novel benzaldehyde dialkyl acetals and preparation and use thereof

Preparation of 2-(4-hydroxyphenoxy)propionic acid by fermentation

Acylation of alkyl aromatic hydrocarbons

Amino compounds and fungicides containing them

Preparation of pyrroles from dialkoxytetrahydrofurans

Novel aliphatic aldehydes and their preparation

Cyclohexane-1,3-dione derivatives and their use for controlling undesirable plant growth

2-substituted 4,4,7,7-tetramethyl-1,3-dioxacycloheptanes, preparation and use thereof as scents

Preparation of but-2-ene-1,4-diones substituted in the 1,4-positions

Oximinophosphoric acid derivatives, their preparation and their use in pest control

Electrolytic preparation of benzaldehydes

Polymers which contain 2-(4-methyl-cyclohex-3-en-1-yl)-propyl-N-acrylamide or -N-methacrylamide groups

Preparation of triphenylphosphine

Preparation of 5-vinylpyrrolidones

Preparation of hydroxybenzaldehydes

4-Methyl-4-phenyl-1-pentanals, their preparation and their use as scents

Preparation of esters of optically active 2-arylalkanoic acids

Optically active phenylpropane derivatives, their preparation and their use for the preparation of fungicides

Preparation of 4-tert.-butylbenzaldehyde

Pinane derivatives

Preparation of 4-substituted imidazoles from N-formyl-α-aminonitrile

Preparation of D- or L-alanine or high enantiomeric purity

4-Tert.-butoxyphenylglycinonitrile and the preparation of D-(-)- and L-(+)-4-hydroxyphenylglycine

Preparation of alkyl-substituted aromatic ketones

Preparation of D-N-carbamyl-α-aminoacids and micro-organisms for carrying out this preparation

Preparation of phenylacetonitriles carrying basic substituents

Substituted 5-formyl-1,3-dioxepans

Diastereomeric salts of malic acid and 2-aminobutanol, and process for the resolution of rademis maic acid

Sterically hindered 4-amino-piperidine with a low dimer content, its production and use

Process for purifying sterically hindered 4-amino piperidines