Granted Patent
Utility
US 5,383,986 · App. 08/030,925
Method of improving transverse direction mechanical properties of aluminum-lithium alloy wrought product using multiple stretching steps
Inventor:
Alex Cho
Patented Case
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Granted: Jan 24, 1995
Filed: Mar 12, 1993
Inventor
Alex Cho
Assignee (at issue)
Reynolds Metals Company
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.