Granted Patent
Utility
US 5,244,576 · App. 07/831,242
Spent caustic treatment
Inventors:
Robert L. DeRoeck, Allan R. Huntley
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Feb 4, 1992
Inventors
Robert L. DeRoeck
Allan R. Huntley
Assignee (at issue)
Stone & Webster Engineering Corp.
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.