Granted Patent
Utility
US 6,405,789 · App. 09/852,478
Combined basket removal door and platform for air preheaters
Inventor:
Michael Zakel
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: May 10, 2001
Inventor
Michael Zakel
Assignee (at issue)
Alstom Power N.V.
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.