Granted Patent
Utility
US 4,650,821 · App. 06/856,607
Novel acrylic castings and process for the preparation thereof
Inventor:
Donald R. Leonard
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Apr 25, 1986
Inventor
Donald R. Leonard
Assignee (at issue)
EASTMAN KODAK COMPANY
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.