Granted Patent
Utility
US 4,236,884 · App. 05/610,631
Internal air cooling of tubular plastic film
Inventor:
Charles M. Schott, Jr.
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Sep 5, 1975
Inventor
Charles M. Schott, Jr.
Assignee (at issue)
Gloucester Engineering Co., Inc.
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.