Granted Patent
Utility
US 4,351,784 · App. 06/216,269
Corona treatment of perforated film
Inventors:
Paul E. Thomas, Garland E. Raley
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Dec 15, 1980
Inventors
Paul E. Thomas
Garland E. Raley
Assignee (at issue)
Ethyl 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.