Granted Patent
Utility
US 6,076,993 · App. 08/876,886
Leaching chamber
Inventor:
Terrance H. Gray
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Jun 16, 1997
Inventor
Terrance H. Gray
Assignee (at issue)
PSA, 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.