Granted Patent
Utility
US 5,215,731 · App. 07/865,161
Process for preparing medium density granular sodium tripolyphosphate
Inventors:
George W. Cadwallader, Louis A. Highfill
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Apr 8, 1992
Inventors
George W. Cadwallader
Louis A. Highfill
Assignee (at issue)
Monsanto 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.