Coloration process for cellulose polyester textile blends with a reactive dye container a quaternary nitrogen substituent (e.g. nicotinic acid) and a disperse dye

Granted: Nov 21, 1989 Filed: Jul 7, 1988

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.