Granted Patent
Utility
US 5,239,040 · App. 07/815,187
Liquid sorbent
Inventor:
Zdzislaw J. Kozlowski
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Dec 31, 1991
Inventor
Zdzislaw J. Kozlowski
Assignee (at issue)
E.R.T. Environmental Research Technology K.S.P.W. 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.