Granted Patent
Utility
US 4,546,012 · App. 06/604,028
Level control for a fluidized bed
Inventor:
Lionel H. Brooks
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Apr 26, 1984
Inventor
Lionel H. Brooks
Assignee (at issue)
Carbomedics 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.