Granted Patent
Utility
US 4,249,930 · App. 06/018,519
Ionic compounds formed from iron and urea
Inventor:
A. David Atkisson
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Mar 8, 1979
Inventor
A. David Atkisson
Assignee (at issue)
Eagle-Picher Industries, 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.