Granted Patent
Utility
US 4,880,544 · App. 07/269,509
Crystal growth process for preparing inorganic dynamic membranes
Inventor:
Joseph Barone
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Nov 10, 1988
Inventor
Joseph Barone
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.