IP Library › Granted Patent US 4,356,221
Granted Patent Utility
US 4,356,221 · App. 06/264,101

Melt-extruded multilayer polyethylene bag film

Inventors: John Anthony, Frank J. Velisek, Paul D. Capponi
Patented Case View Patent ↗
Granted: Oct 26, 1982 Filed: May 15, 1981
Inventors
John Anthony
Frank J. Velisek
Paul D. Capponi
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,356,221
App. No.
06/264,101
Filed
1981-05-15
Granted
1982-10-26
Kind
A