Granted Patent
Utility
US 5,389,261 · App. 08/114,793
Condensate polisher regenerant system
Inventors:
John Daly, Ronald L. Oleka
Patented Case
View Patent ↗
Granted: Feb 14, 1995
Filed: Aug 31, 1993
Inventors
John Daly
Ronald L. Oleka
Assignee (at issue)
Grace Dearborn 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.