Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid

Process for the preparation of 1-aminonaphthalene-2,4,7-trisulphonic acid and 1-aminonaphthalene-7-sulphonic acid

US Patent 4873026 · Granted Oct 10, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Preparation of 3-acyloxy-2-methylbenzoic acids2005
Method for producing n-butyryl-4-amino-3-methyl-methyl benzoate and the novel co2003
Method for producing 4-hydroxy-3-nitrobiphenyl2003
Method for preparing 2-nitro-5-(phenylthio)-anilines2003
Method for preparing methyl carbazate2002
Process for the preparation of salts of 1-substituted 2,4-diaminobenzenes2001
Preparation of N-phenyl-1-naphthylamine2000
Process for preparing 4,6-diamino-resorcinol dihydrochloride2000
Process for preparing 4,6-diamino-resorcinol dihydrochloride2000
Process for the preparation of alkyl aryl ethers containing carboxyl groups1999
Process for the preparation of 2-amino-5-alkyl-phenols1998
Process for the preparation of 4-hydroxybiphenyl1998