Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Colorants for ball-point pen and ribbon inks

Colorants for ball-point pen and ribbon inks

US Patent 4824610 · Granted Apr 25, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Dye-latex combinations and use in aqueous inks1992
Azo colorants for ball point pen and ribbon inks1990
Azo colorants for ball point pen and ribbon inks1990
Rigmentary salt of a triphenylmethane compound and process for making same1990
Pigment product1990
Process for the synthesis of 3-chloro-2,4,5-trifluorobenzoic acid1989
Colorants for ball point pen and ribbon inks derived from pararosaniline process1989
Process for preparing ferriferrocyanide pigments1985
Solvent extraction of nitrated organic compounds from aqueous solutions1984
Preparation of easily dispersible and deeply colored pigmentary forms1981
Phthalocyanine formulations1981
Pigment formulations1981