Positive-working radiation sensitive mixture comprising sulfonic acid esters of 2,4,6-tris-(2-hydroxyethoxy)-[1,3,5]triazine, and recording material containing these esters

Granted: May 24, 1994 Filed: Apr 20, 1992

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.