IP Library › Granted Patent US 4,595,738
Granted Patent Utility
US 4,595,738 · App. 06/717,573

Polypropylene film

Inventors: Walter Hufnagel, Heinz Vates
Patented Case View Patent ↗
Granted: Jun 17, 1986 Filed: Mar 29, 1985
Inventors
Walter Hufnagel
Heinz Vates
Assignee (at issue)
Internationale Otrool Maatschappij Octropa B.V.

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 4,595,738
App. No.
06/717,573
Filed
1985-03-29
Granted
1986-06-17
Kind
A