Wilhelm Eckert

Vat dyestuffs and process of preparing them

New vat dyestuff isomers

Mono-molecular condensation product of 1.4.5.8-naphthalene-tetra-carboxylic acid andalpha process of preparing it

Vat-dyestuffs of the naphthalimide series and a process of preparing them

Vat dyestuffs derived from 1,4,5,8-naphthalene-tetra-carboxylic acid and a process of preparing them

Nuclear substituted acenaphthalic acids and 1.4.5.8-naphthalenetetracarboxylic acidsand process of preparing them

Process of separating the mixtures of isomeric 1.4. 5. 8-naphthoylene-diarylimidazoles and new dyestuff obtained thereby

Separation of new vat dyestuff isomers

Dyestuffs of the anthracene series and a process of preparing them

Vat dyestuffs and a process of preparing them