Granted Patent
Utility
US 4,335,220 · App. 06/251,646
Sequestering agents and compositions produced therefrom
Inventor:
Charles H. Coney
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Apr 6, 1981
Inventor
Charles H. Coney
Assignee (at issue)
EASTMAN KODAK 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.