Granted Patent
Utility
US 4,366,128 · App. 06/192,766
Removal of arsenic from aqueous solutions
Inventors:
Donald R. Weir, Ian M. Masters
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: Oct 1, 1980
Inventors
Donald R. Weir
Ian M. Masters
Assignee (at issue)
Sherritt Gordon Mines 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.