Granted Patent
Utility
US 4,842,822 · App. 06/943,434
Aluminum-lithium alloy and method of investment casting an aluminum-lithium alloy
Inventors:
Gregory N. Colvin, Stewart J. Veeck
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Dec 19, 1986
Inventors
Gregory N. Colvin
Stewart J. Veeck
Assignee (at issue)
HOWMET 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.