Inventor
FREEMAN HAROLD S
US6 patents
⚠️ This page may combine multiple inventors who share the name “FREEMAN HAROLD S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNIV NORTH CAROLINA STATE
4 patentsUS4902787AFeb 20, 1990
Method for producing lightfast disperse dyestuffs containing a build-in photostabilizer [molecule] compound
UNIV NORTH CAROLINA STATE62 citations92
US5376151ADec 27, 1994
Environmentally friendly method for producing lightfast black shades on natural and synthetic substrates
UNIV NORTH CAROLINA STATE19 citations73
US5965717AOct 12, 1999
Organic pigments from twisted benzidines
UNIV NORTH CAROLINA STATE5 citations56
US5677434AOct 14, 1997
Iron-complexed formazan dyes for polyamide and protein substrates
UNIV NORTH CAROLINA STATE0 citations44