Granted Patent
Utility
US 5,877,112 · App. 08/921,200
Agricultural formulation
Inventors:
Johnnie R. Roberts, Greg Volgas
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Aug 27, 1997
Inventors
Johnnie R. Roberts
Greg Volgas
Assignee (at issue)
HELENA CHEMICAL CORP.
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.