Granted Patent
Utility
US 6,110,333 · App. 09/070,040
Composite membrane with highly crystalline porous support
Inventors:
Jeffrey E. Spethmann, James T. Keating
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Apr 30, 1998
Inventors
Jeffrey E. Spethmann
James T. Keating
Assignees (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
Donaldson Company, 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.