Granted Patent
Utility
US 4,920,640 · App. 07/148,829
Hot pressing dense ceramic sheets for electronic substrates and for multilayer electronic substrates
Inventors:
Jack H. Enloe, John W. Lau, Christian B. Lundsager, Roy W. Rice
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Jan 27, 1988
Inventors
Jack H. Enloe
John W. Lau
Christian B. Lundsager
Roy W. Rice
Assignee (at issue)
W.R. Grace & Co. Conn.
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.