Process for the preparation of 2,4,6-triiodo-5-amino-N-alkylisophthalamic acid and 2,4,6-triiodo-5-amino-isophthalamide compounds

Granted: May 7, 1991 Filed: Jul 24, 1989

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.