Granted Patent
Utility
US 5,988,867 · App. 09/008,102
Preassembled fluidizing device having expansive air passage stimulating enhanced flow of granular materials in tank trailers and containers
Inventor:
David E. Sisk
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jan 16, 1998
Inventor
David E. Sisk
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.