Granted Patent
Utility
US 4,906,377 · App. 07/346,976
Fluorocarbon membranes and process for making fluorocarbon membranes
Inventors:
Larry Y. Yen, George Lopatin
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: May 3, 1989
Inventors
Larry Y. Yen
George Lopatin
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.