Granted Patent
Utility
US 4,387,244 · App. 06/367,973
Chelating agents for non-aqueous systems
Inventors:
Patricia Scanlon, E. Richard Young
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Oct 23, 1981
Inventors
Patricia Scanlon
E. Richard Young
Assignee (at issue)
W. R. Grace & Co.
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.