Granted Patent
Utility
US 4,842,883 · App. 07/142,908
Continuous produce surface treater and method
Inventor:
John H. Amstad
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jan 11, 1988
Inventor
John H. Amstad
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.