Granted Patent
Utility
US 6,420,512 · App. 09/911,439
Extrusion method for making polycarbonate
Inventors:
Patrick Joseph McCloskey, James Day, Paul Michael Smigelski, Jr., John Lester Maxam, John Aibangbee Osaheni
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jul 24, 2001
Inventors
Patrick Joseph McCloskey
James Day
Paul Michael Smigelski, Jr.
John Lester Maxam
John Aibangbee Osaheni
Assignee (at issue)
General Electric Company
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.