Granted Patent
Utility
US 6,003,221 · App. 08/827,415
Metal matrix composites containing electrical insulators
Inventors:
Ralph R. Sawtell, Mosur K. Premkumar, David I. Yun
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Mar 27, 1997
Inventors
Ralph R. Sawtell
Mosur K. Premkumar
David I. Yun
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.