Granted Patent
Utility
US 5,183,937 · App. 07/798,361
Acetic acid recovery
Inventor:
Mark R. Johnson
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Nov 21, 1991
Inventor
Mark R. Johnson
Assignee (at issue)
The NutraSweet Company
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.