2- and 5-alkyl and phenyl substituted 4-(1-hydroxy, 1-acyloxy or 1-carbamoyloxy)-5-hydroxy-2 (5H)-furanones as anti-inflammatory agents

Granted: Feb 2, 1993 Filed: Apr 30, 1991

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.