Granted Patent
Utility
US 5,439,181 · App. 08/320,108
Chevron device limiting mill discharge in a fluid bed system
Inventor:
Robert M. Williams
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Sep 29, 1994
Inventor
Robert M. Williams
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.