Granted Patent
Utility
US 4,381,820 · App. 06/334,105
Filament reinforced plastic screen and apparatus for making same
Inventor:
Walter R. Wagner
Patented Case
View Patent ↗
Granted: May 3, 1983
Filed: Dec 24, 1981
Inventor
Walter R. Wagner
Assignee (at issue)
UOP LLC
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.