Granted Patent
Utility
US 4,523,721 · App. 06/447,916
Bowl mill with primary classifier assembly
Inventors:
Theodore V. Maliszewski, David Kohler
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Dec 8, 1982
Inventors
Theodore V. Maliszewski
David Kohler
Assignee (at issue)
Combustion Engineering, Inc.
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.