Granted Patent
Utility
US 6,653,511 · App. 10/237,345
Perfluoropolyether primary bromides and iodides
Inventors:
Jon Lee Howell, Erik William Perez, Alfred Waterfeld, Chadron Friesen, Joseph Stuart Thrasher, Ireneusz Nowak
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Sep 9, 2002
Inventors
Jon Lee Howell
Erik William Perez
Alfred Waterfeld
Chadron Friesen
Joseph Stuart Thrasher
Ireneusz Nowak
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.