Granted Patent
Utility
US 5,225,087 · App. 07/698,502
Recovery of EDTA from steam generator cleaning solutions
Inventor:
Zoltan Kardos
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: May 10, 1991
Inventor
Zoltan Kardos
Assignee (at issue)
Westinghouse Electric Company 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.