Granted Patent
Utility
US 5,166,115 · App. 07/829,444
Polyurethanes
Inventor:
William R. Brown
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Feb 3, 1992
Inventor
William R. Brown
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.