Granted Patent
Utility
US 4,481,087 · App. 06/334,011
Process for removing chromate from solution
Inventor:
Peter M. DiGiacomo
Patented Case
View Patent ↗
Granted: Nov 6, 1984
Filed: Dec 23, 1981
Inventor
Peter M. DiGiacomo
Assignee (at issue)
Occidental Chemical Corporation
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.