Inventor
FRISCHKORN HANS
DE8 patents
Patents
8 patentsUS4791205ADec 13, 1988
Bisbenzoxazolylnaphthalenes containing sulfonate or sulfonamide groups, a process for their preparation and their use
HOECHST AG7 citations73
US4447350AMay 8, 1984
Mixtures of optical brighteners and their use
HOECHST AG12 citations72
US4271036AJun 2, 1981
Colorless formulations of optical brighteners from the series of bis-triazinylamino-stilbene-disulfonic acid compounds
HOECHST AG8 citations72
US4110246AAug 29, 1978
Mixture of benzoxazole derivatives
HOECHST AG13 citations72
US3996213ADec 7, 1976
1,2,4-Triazolyl-(1) derivatives, a process for their preparation and their use as optical brighteners
HOECHST AG5 citations62
US4416795ANov 22, 1983
Mixtures of optical brighteners
HOECHST AG6 citations61
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