Granted Patent
Utility
US 5,264,447 · App. 07/939,893
Angiotensin II antagonist
Inventor:
Masakatsu Ohtawa
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: Sep 1, 1992
Inventor
Masakatsu Ohtawa
Assignee (at issue)
MERCK & CO., 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.