Granted Patent
Utility
US 4,645,532 · App. 06/787,186
Production of fine spherical copper powder
Inventors:
Vladimir N. Mackiw, Alexander Nadezhdin, Donald R. Weir
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Oct 15, 1985
Inventors
Vladimir N. Mackiw
Alexander Nadezhdin
Donald R. Weir
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.