Granted Patent
Utility
US 5,017,041 · App. 07/341,902
Leaching system conduit with high rigidity joint
Inventor:
James M. Nichols
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Apr 24, 1989
Inventor
James M. Nichols
Assignee (at issue)
INFILTRATOR SYSTEMS INC
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.