Process for the preparation of 2-aryl-1-substituted-5-(trifluoromethyl) pyrrole compounds useful as insecticidal, acaricidal and nematocidal agents and as intermediates for the manufacture of said agents

Granted: Sep 1, 1992 Filed: Mar 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.