Granted Patent
Utility
US 6,817,596 · App. 10/304,255
Tray column
Inventor:
Markus Fischer
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Nov 25, 2002
Inventor
Markus Fischer
Assignee (at issue)
Sulzer Chemtech AG
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.