Granted Patent
Utility
US 4,895,868 · App. 07/212,855
Thiochroman esters of phenols and terephthallates having retinoid-like activity
Inventor:
Roshantha A. Chandraratna
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: Jun 29, 1988
Inventor
Roshantha A. Chandraratna
Assignee (at issue)
Allergan, Inc.
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.