Granted Patent
Utility
US 5,137,686 · App. 07/149,802
Aluminum-lithium alloys
Inventors:
Roberto J. Rioja, Alex Cho, Edward L. Colvin, Asuri K. Vasudevan
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Jan 28, 1988
Inventors
Roberto J. Rioja
Alex Cho
Edward L. Colvin
Asuri K. Vasudevan
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.