Granted Patent
Utility
US 6,572,979 · App. 09/622,758
Thermoplastic film for packaging
Inventors:
Herbert Franz Wollak, Bernard Rioux
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Aug 21, 2000
Inventors
Herbert Franz Wollak
Bernard Rioux
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.