Granted Patent
Utility
US 4,927,831 · App. 07/357,563
Spiro-isoquinoline-pyrrolidine tetrones and analogs thereof useful as aldose reductase inhibitors
Inventor:
Michael S. Malamas
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: May 26, 1989
Inventor
Michael S. Malamas
Assignee (at issue)
Amerimas Home Products, 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.