Granted Patent
Utility
US 5,045,544 · App. 07/526,362
N'-alkyl-spiro-isoquinoline-pyrrolidine tetrones and analogs thereof useful as aldose reductase inhibitors
Inventor:
Michael S. Malamas
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: May 21, 1990
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.