Granted Patent
Utility
US 4,608,221 · App. 06/687,250
Process for reducing draw resonance in polymeric film
Inventors:
Stuart J. Kurtz, Ernest H. Roberts, Peter J. Lucchesi
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Dec 28, 1984
Inventors
Stuart J. Kurtz
Ernest H. Roberts
Peter J. Lucchesi
Assignee (at issue)
Union Carbide Corporation
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.