Granted Patent
Utility
US 5,929,020 · App. 08/786,002
Process for chelating divalent metal ions in alkaline detergent formulations
Inventor:
Stephen F. Gross
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Jan 21, 1997
Inventor
Stephen F. Gross
Assignee (at issue)
Henkel Limited
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.