Granted Patent
Utility
US 6,202,854 · App. 09/273,641
Air classifier for particulate material
Inventors:
Clarence Krieser, James F. Miller
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Mar 23, 1999
Inventors
Clarence Krieser
James F. Miller
Assignee (at issue)
Marsulex Environmental Technologies Corporation
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.