Granted Patent
Utility
US 4,321,713 · App. 06/207,400
Large capacity drainage receptacle
Inventor:
C. Ames Thompson
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: Nov 17, 1980
Inventor
C. Ames Thompson
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.