Granted Patent
Utility
US 4,873,068 · App. 07/250,053
Process for manufacturing tetrasodium pyrophosphate
Inventor:
Paul L. Hensler
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Sep 28, 1988
Inventor
Paul L. Hensler
Assignee (at issue)
FMC 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.