Granted Patent
Utility
US 4,436,778 · App. 06/485,760
Multilayer tubular body with uncentered barrier layer
Inventor:
Jeffrey N. Dugal
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Apr 22, 1983
Inventor
Jeffrey N. Dugal
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.