Granted Patent
Utility
US 5,935,441 · App. 08/708,625
Water purification process
Inventors:
Gary A. O'Neill, Kitty K. Siu, Jeffrey P. Denoncourt
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Sep 5, 1996
Inventors
Gary A. O'Neill
Kitty K. Siu
Jeffrey P. Denoncourt
Assignee (at issue)
Millipore 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.