Granted Patent
Utility
US 4,424,182 · App. 06/329,625
Method for sealing a multilayered tube having a barrier layer
Inventor:
Daryl D. Cerny
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Dec 11, 1981
Inventor
Daryl D. Cerny
Assignee (at issue)
BALL 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.