Granted Patent
Utility
US 5,380,445 · App. 08/139,840
Pretreatment of microbial sludges
Inventors:
Christopher J. Rivard, Nicholas J. Nagle
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Oct 22, 1993
Inventors
Christopher J. Rivard
Nicholas J. Nagle
Assignee (at issue)
Midwest Research Institute, 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.