Granted Patent
Utility
US 5,587,429 · App. 08/416,414
Processing aid system for polyolefins
Inventor:
Donnan E. Priester
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Apr 4, 1995
Inventor
Donnan E. Priester
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.