Inventor

SCHINZEL ERICH

DE33 patents

Patents

33 patents

US4002423AJan 11, 1977

Benzofuran derivatives process for their preparation and their use as optical brighteners

HOECHST AG23 citations81

US3951965AApr 20, 1976

Bis-triazinyl-amino)-stilbene-disulfonic acid derivatives

HOECHST AG23 citations81

US4473371ASep 25, 1984

Perfluoroalkyl esters, a process for their preparation and their use as a soil-repellant agent

HOECHST AG21 citations80

US4122257AOct 24, 1978

Benzofuran-oxadiazole compounds

HOECHST AG30 citations78

US4791205ADec 13, 1988

Bisbenzoxazolylnaphthalenes containing sulfonate or sulfonamide groups, a process for their preparation and their use

HOECHST AG7 citations73

US3974172AAug 10, 1976

Benzofuran derivatives

HOECHST AG17 citations73

US4508900AApr 2, 1985

Cationic compounds of the naphthalimide series, process for their preparation and their use

HOECHST AG9 citations72

US4447350AMay 8, 1984

Mixtures of optical brighteners and their use

HOECHST AG12 citations72

US4309551AJan 5, 1982

Quaternized, bridged benzimidazolylbenzimidazoles, processes for their preparation and their use

HOECHST AG13 citations72

US4263441AApr 21, 1981

Novel fluorine-containing benz-azole derivatives, process for their manufacture and their use as optical brighteners

HOECHST AG7 citations72

US4246403AJan 20, 1981

Benzoxazole derivatives, process for their preparation and their use as optical brighteners

HOECHST AG9 citations72

US4039531AAug 2, 1977

4-Stilbenyl-1,2,3-triazoles, process for preparing them and their use as optical brighteners

HOECHST AG8 citations72

US4016195AApr 5, 1977

Monostyryl-naphthalene derivatives

HOECHST AG11 citations72

US3931215AJan 6, 1976

Benzofuran derivatives

HOECHST AG11 citations71

US4814453AMar 21, 1989

Naphthalimides containing sulfuric acid ester groups, a process for their preparation and their use

HOECHST AG5 citations63

US4133953AJan 9, 1979

Process for the preparation of sulfonated benzofuran derivatives

HOECHST AG2 citations63

US4039555AAug 2, 1977

Benzofuran derivatives, process for preparing them and their use as optical brighteners

HOECHST AG2 citations62

US4001130AJan 4, 1977

Optical brighteners

HOECHST AG3 citations62

US3996213ADec 7, 1976

1,2,4-Triazolyl-(1) derivatives, a process for their preparation and their use as optical brighteners

HOECHST AG5 citations62

US4595756AJun 17, 1986

Cationic compounds of the naphthalimide series, process for their preparation and their use

HOECHST AG3 citations61

US4416795ANov 22, 1983

Mixtures of optical brighteners

HOECHST AG6 citations61

US3957846AMay 18, 1976

Monostyryl-naphthalene derivatives

HOECHST AG3 citations61

US3998812ADec 21, 1976

Styryl-pyrazoline compounds

HOECHST AG2 citations60

US4001221AJan 4, 1977

4-stilbenyl-5-cyano-1,2,3-triazoles

HOECHST AG6 citations58

US4675402AJun 23, 1987

Process for the preparation of dialkoxytriazinylpyrenes

HOECHST AG1 citations52

US4309536AJan 5, 1982

Process for the manufacture of bis-benzo-furanyl compounds

HOECHST AG0 citations52

US4376214AMar 8, 1983

Process for the preparation of naphthalene-1,4-dicarboxylic acid

HOECHST AG1 citations51

US4375556AMar 1, 1983

Process for the preparation of naphthalene-1,4-dicarboxylic acid

HOECHST AG0 citations51

US3972877AAug 3, 1976

Butadiene derivatives, process for their preparation and their use as optical brighteners

HOECHST AG0 citations51

US4587338AMay 6, 1986

Perfluoroalkyl esters of anthranilic acids

HOECHST AG0 citations37

SCHINZEL ERICH

Patents

Benzofuran derivatives process for their preparation and their use as optical brighteners

Bis-triazinyl-amino)-stilbene-disulfonic acid derivatives

Perfluoroalkyl esters, a process for their preparation and their use as a soil-repellant agent

Benzofuran-oxadiazole compounds

Bisbenzoxazolylnaphthalenes containing sulfonate or sulfonamide groups, a process for their preparation and their use

Benzofuran derivatives

Cationic compounds of the naphthalimide series, process for their preparation and their use

Mixtures of optical brighteners and their use

Quaternized, bridged benzimidazolylbenzimidazoles, processes for their preparation and their use

Novel fluorine-containing benz-azole derivatives, process for their manufacture and their use as optical brighteners

1,3,4-Oxadiazolone-(2) compounds and process for their manufacture

4-Benzoxazolyl-4&#39;-oxadiazolyl stilbene optical brighteners

Brightener mixtures and their use

Benzoxazole derivatives, process for their preparation and their use as optical brighteners

4-Stilbenyl-1,2,3-triazoles, process for preparing them and their use as optical brighteners

Monostyryl-naphthalene derivatives

Benzofuran derivatives

Naphthalimides containing sulfuric acid ester groups, a process for their preparation and their use

Process for the preparation of sulfonated benzofuran derivatives

Benzofuran derivatives, process for preparing them and their use as optical brighteners

Optical brighteners

1,2,4-Triazolyl-(1) derivatives, a process for their preparation and their use as optical brighteners

Cationic compounds of the naphthalimide series, process for their preparation and their use

Mixtures of optical brighteners

Monostyryl-naphthalene derivatives

Styryl-pyrazoline compounds

4-stilbenyl-5-cyano-1,2,3-triazoles

Process for the preparation of dialkoxytriazinylpyrenes

Process for the manufacture of bis-benzo-furanyl compounds

Process for the preparation of naphthalene-1,4-dicarboxylic acid

Process for the preparation of naphthalene-1,4-dicarboxylic acid

Butadiene derivatives, process for their preparation and their use as optical brighteners

Perfluoroalkyl esters of anthranilic acids

4-Benzoxazolyl-4'-oxadiazolyl stilbene optical brighteners