Granted Patent
Utility
US 6,718,652 · App. 10/093,075
Rotary particle-drying drum
Inventors:
Andreas Klug, Wolfgang Schröder
Patented Case
View Patent ↗
Granted: Apr 13, 2004
Filed: Mar 7, 2002
Inventors
Andreas Klug
Wolfgang Schröder
Assignee (at issue)
Buttner Gesellschaft fur Trocknungs-und Umwelttechnik mbH
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.