Granted Patent
Utility
US 4,848,647 · App. 07/172,505
Aluminum base copper-lithium-magnesium welding alloy for welding aluminum lithium alloys
Inventors:
Rebecca A. Gentry, Richard P. Martukanitz
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Mar 24, 1988
Inventors
Rebecca A. Gentry
Richard P. Martukanitz
Assignee (at issue)
Aluminum Company of America
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.