Granted Patent
Utility
US 5,181,940 · App. 07/739,322
Hollow fiber membranes
Inventors:
Benjamin Bikson, James Timothy Macheras, Joyce K. Nelson
Patented Case
View Patent ↗
Granted: Jan 26, 1993
Filed: Aug 1, 1991
Inventors
Benjamin Bikson
James Timothy Macheras
Joyce K. Nelson
Assignee (at issue)
Union Carbide Industrial Gases Technology 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.