Granted Patent
Utility
US 4,728,345 · App. 06/566,132
Multicomponent gas separation membranes having polyphosphazene coatings
Inventor:
Milton K. Murphy
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Dec 28, 1983
Inventor
Milton K. Murphy
Assignee (at issue)
Monsanto Company
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.