Granted Patent
Utility
US 5,399,263 · App. 07/950,931
Water purifier
Inventors:
Chester E. Chomka, James R. Edwards, Charles T. Nachtman
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Sep 24, 1992
Inventors
Chester E. Chomka
James R. Edwards
Charles T. Nachtman
Assignee (at issue)
Barnstead/Thermolyne Corporation
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.