Granted Patent
Utility
US 5,698,281 · App. 08/670,250
Composite ultrafiltration membrane
Inventors:
Ellen C. Bellantoni, Robert Loya
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jun 20, 1996
Inventors
Ellen C. Bellantoni
Robert Loya
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.