Granted Patent
Utility
US 4,540,663 · App. 06/496,444
Liquefaction of starch
Inventor:
Paul R. Witt
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: May 20, 1983
Inventor
Paul R. Witt
Assignee (at issue)
Grain Processing Corporation
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.