Inventor
FRISWELL MICHAEL R
US14 patents
⚠️ This page may combine multiple inventors who share the name “FRISWELL MICHAEL R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MORTON INT INC
9 patentsUS5980593ANov 9, 1999
Silent fluorescent petroleum markers
MORTON INT INC44 citations91
US5205840AApr 27, 1993
Markers for petroleum, method of tagging, and method of detection
MORTON INT INC35 citations91
US5156653AOct 20, 1992
Silent markers for petroleum, method of tagging, and method of detection
MORTON INT INC31 citations91
US5737871AApr 14, 1998
Method of preparing and utilizing petroleum fuel markers
MORTON INT INC8 citations73
US5490872AFeb 13, 1996
Acid extractable petroleum fuel markers
MORTON INT INC16 citations71
US5306343AApr 26, 1994
Tagging and identifying asphalt additives
MORTON INT INC13 citations68
US5142030AAug 25, 1992
Disazo colorants having a 4,4'-diaminobenzanilide tetrazo component
MORTON INT INC8 citations65
US5049189ASep 17, 1991
Method of preparing a solution of sulfonated aryl azo/diaryl guanidine-complexed dye
MORTON INT INC3 citations59
US5504199AApr 2, 1996
Method of introducing dyes to ethanol
MORTON INT INC0 citations46