[4-(1,2-epoxycyclohexanyl)but-3-en-1-ynyl]aromatic and heteroaromatic acids and derivatives having retinoid-like biological activity

Granted: Jun 20, 1995 Filed: Dec 30, 1993

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.