Granted Patent
Utility
US 5,258,423 · App. 08/060,849
Stabilization of methacrylic polymers against sterilizing radiation
Inventors:
Charles C. Crabb, Robert A. Wanat, Paul J. Keating, Donald E. Roach
Patented Case
View Patent ↗
Granted: Nov 2, 1993
Filed: May 12, 1993
Inventors
Charles C. Crabb
Robert A. Wanat
Paul J. Keating
Donald E. Roach
Assignee (at issue)
Rohm and Haas 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.