Granted Patent
Utility
US 6,413,433 · App. 09/652,928
Method for dewatering of sludge
Inventors:
Elise E. Maury, Livio Mattucci, Fernando Urbani, Massimo Borelli, John W. Sparapany
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Aug 31, 2000
Inventors
Elise E. Maury
Livio Mattucci
Fernando Urbani
Massimo Borelli
John W. Sparapany
Assignee (at issue)
Nalco Chemical Company
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.