Granted Patent
Utility
US 5,536,754 · App. 08/534,525
Fluorinated ion-exchange polymers and intermediates therefor
Inventor:
Andrew Edward Feiring
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Sep 27, 1995
Inventor
Andrew Edward Feiring
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.