3-[5-[1-(2 or 3-Halophenoxy)alkyl, alkynyl, alkenyl, or haloalkyl]-1,3,4-thiadiazol-2-yl]-4-hydroxy-1-methyl-2-imidazolidinones

Granted: May 26, 1981 Filed: Jun 18, 1979

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.