Granted Patent
Utility
US 6,133,389 · App. 08/869,521
Amorphous tetrafluoroethylene-hexafluoropropylene copolymers
Inventors:
Colin Anolick, Viacheslav A. Petrov, Bruce E. Smart, Charles W. Stewart, Robert Clayton Wheland, William B. Farnham, Andrew Edward Feiring, Weiming Qiu
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Jun 6, 1997
Inventors
Colin Anolick
Viacheslav A. Petrov
Bruce E. Smart
Charles W. Stewart
Robert Clayton Wheland
William B. Farnham
Andrew Edward Feiring
Weiming Qiu
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.