Granted Patent
Utility
US 4,968,346 · App. 07/414,818
Method for eluting adsorbed gold from carbon
Inventors:
Anthony L. Belsak, Narendrakumar C. Desai, Thomas F. McConnell, Curt A. Williams
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Sep 29, 1989
Inventors
Anthony L. Belsak
Narendrakumar C. Desai
Thomas F. McConnell
Curt A. Williams
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.