Granted Patent
Utility
US 4,853,060 · App. 07/158,839
Method of forming a composite tubular structure
Inventor:
Herbert W. Nickel
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Feb 22, 1988
Inventor
Herbert W. Nickel
Assignee (at issue)
A. O. Smith 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.