Granted Patent
Utility
US 6,238,637 · App. 09/250,254
Process and apparatus for preparation of phosphorus oxyacids from elemental phosphorus
Inventors:
Jerald D. Heise, Erik D. Sall, Martin P. McGrath
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Feb 16, 1999
Inventors
Jerald D. Heise
Erik D. Sall
Martin P. McGrath
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.