Granted Patent
Utility
US 4,598,123 · App. 06/729,458
Impact modified methyl methacrylate polymer
Inventor:
Louis A. Cutter
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: May 1, 1985
Inventor
Louis A. Cutter
Assignee (at issue)
United States Steel Corporation
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.