Granted Patent
Utility
US 6,609,638 · App. 10/201,141
Flow promoter for hoppers
Inventor:
W. Gerald Lott
Patented Case
View Patent ↗
Granted: Aug 26, 2003
Filed: Jul 22, 2002
Inventor
W. Gerald Lott
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.