Granted Patent
Utility
US 6,814,838 · App. 09/821,787
Vacuum treatment chamber and method for treating surfaces
Inventor:
Juergen Weichart
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Mar 29, 2001
Inventor
Juergen Weichart
Assignee (at issue)
Unaxis Balzers Aktiengesellschaft
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.