Process for the preparation of concentrated aqueous, substantially salt-free solutions of aminotriazinyl reactive dyes, aqueous dye solutions produced thereby and process of dyeing

Granted: Sep 11, 1990 Filed: Dec 6, 1985

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.