Granted Patent
Utility
US 6,170,976 · App. 09/406,419
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: Jan 9, 2001
Filed: Sep 27, 1999
Inventor
David E. Sisk
Assignee (at issue)
Sure Seal, 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.