Granted Patent
Utility
US 5,259,436 · App. 07/682,513
Fabrication of metal matrix composites by vacuum die casting
Inventors:
David I. Yun, Ralph R. Sawtell, Warren H. Hunt, Jr., H. Robert Baumgartner, Eric Streicher, Michael F. Ehman
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Apr 8, 1991
Inventors
David I. Yun
Ralph R. Sawtell
Warren H. Hunt, Jr.
H. Robert Baumgartner
Eric Streicher
Michael F. Ehman
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.