Granted Patent
Utility
US 5,762,666 · App. 08/634,201
Feeder-air lock with slide gates
Inventors:
David L. Amrein, Ronda M. White, Donald Pulford, Sr.
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Apr 18, 1996
Inventors
David L. Amrein
Ronda M. White
Donald Pulford, Sr.
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.