Granted Patent
Utility
US 6,730,227 · App. 10/109,260
Method of monitoring membrane separation processes
Inventors:
E. H. Kelle Zeiher, Bosco Ho, John E. Hoots
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Mar 28, 2002
Inventors
E. H. Kelle Zeiher
Bosco Ho
John E. Hoots
Assignee (at issue)
Nalco 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.