Granted Patent
Utility
US 5,677,404 · App. 08/606,132
Tetrafluoroethylene terpolymer
Inventor:
Leslie Mitchell Blair
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Feb 23, 1996
Inventor
Leslie Mitchell Blair
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.