Jim Fuerholzer
James J Fuerholzer, Alejandro Zimin Sr, Peter A Caputo, James J Baluyut: Tagging of waterborne compositions with oil-soluble markers. Morton International, Wayne E Nacker, Gerald K White, May 11, 1999: US05902750 (2 worldwide citation)

A water-immiscible marker is dissolved in polyethylene glycol or other suitable carrier, and the marker so dissolved is added to a waterborne composition which is used as an additive to a waterborne or water processable composition. Subsequently, the marker is either extracted with a non-polar solve ...