Granted Patent
Utility
US 6,728,503 · App. 09/855,985
Electrophotographic image developing process with optimized average developer bulk velocity
Inventors:
Eric C. Stelter, Joseph E. Guth, Matthias H. Regelsberger, Edward M. Eck, Ulrich Mutze
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: May 15, 2001
Inventors
Eric C. Stelter
Joseph E. Guth
Matthias H. Regelsberger
Edward M. Eck
Ulrich Mutze
Assignee (at issue)
Heidelberger Druckmaschinen 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.