Granted Patent
Utility
US 5,022,912 · App. 07/128,146
Methods for fertilizing with ammoniacal fertilizers
Inventors:
Donald C. Young, James A. Green, II
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Dec 3, 1987
Inventors
Donald C. Young
James A. Green, II
Assignee (at issue)
Union Oil Company of California
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.