Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Non-pyrophoric nigrosine base

Non-pyrophoric nigrosine base

US Patent 4359577 · Granted Nov 16, 1982

Estimated economic value: $1,595,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method for the preparation of Leuco Crystal Violet Lactone1984
Phosphinic acid flame retardants for polyphenylene ether resins1982
Flame retarded, rubber-modified, polyphenylene ether resin compositions1981
Phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin compo1981
Bis phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin c1981
Phosphine oxide flame retarded, rubber-modified, polyphenylene ether resin compo1981
Flame retardant poly(butylene terephthalate) composition1981
Flame retardant poly(butylene terephthalate) compositions comprising melamine py1981
Synergistic flame retardant compositions for polyphenylene ether resins1981
Flame retardants containing two or more 2-cyanoethyl groups for polyphenylene et1981
Flame-retardant, polyphenylene-ether resin compositions containing a 2,5,5-trisu1980
Process for preparing aryl[4,4'-bis(di-loweralkyl-amino)benzhydryl]sulfones1980