Granted Patent
Utility
US 4,629,491 · App. 06/563,347
Oxidized sulfur derivatives of diaminophosphinyl compounds as urease inhibitors and urease inhibited urea based fertilizer compositions
Inventors:
Michael D. Swerdloff, Milorad M. Rogic, Larry L. Hendrickson
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Dec 20, 1983
Inventors
Michael D. Swerdloff
Milorad M. Rogic
Larry L. Hendrickson
Assignee (at issue)
ALLIED CONSULTING, INC.
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.