Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Azo dye derivatives of 2,3-naphthalenediols

Azo dye derivatives of 2,3-naphthalenediols

US Patent 4247459 · Granted Jan 27, 1981

Estimated economic value: $5,781,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Scooter rack2019
Skateboard rack2018
Photographic elements containing cyan dye-forming coupler having a particular fo1999
Photographic elements containing cyan dye-forming coupler having a sulfone balla1997
Photographic elements containing new cyan dye-forming coupler providing improved1997
Photographic elements containing new magenta dye-forming couplers1997
Toner particles produced by limited coalescence polymerization1996
Recording liquids for ink-jet recording1995
Ink-jet recording liquids1994
Pyrrolinone dyes1994
Styrene butylacrylate toner with magenta dye1992
Electrophotographic elements containing dicyanomethylenefluorene derivatives as 1991