Granted Patent
Utility
US 6,202,475 · App. 09/386,899
Predicting logarithmic reduction values
Inventors:
Michael R. L. Selbie, Humphrey John Jardine Drummond, Warren Thomas Johnson
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Aug 31, 1999
Inventors
Michael R. L. Selbie
Humphrey John Jardine Drummond
Warren Thomas Johnson
Assignee (at issue)
USF Filtration and Separations Group, 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.