Granted Patent
Utility
US 5,509,993 · App. 08/217,598
Process for the preparation of a metal and graphite laminate
Inventor:
Alfred Hirschvogel
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: Mar 24, 1994
Inventor
Alfred Hirschvogel
Assignee (at issue)
Sigri Great Lakes Carbon GmbH
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.