Methods for preparing cocrystals of titanyl fluorophthalocyanines and unsubstituted titanyl phthalocyanine, electrophotographic elements, and titanyl phthalocyanine compositions

Granted: Mar 25, 1997 Filed: May 2, 1995

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.