Granted Patent
Utility
US 5,670,126 · App. 08/596,815
Method for extracting antimony from elemental phosphorus
Inventor:
Louis T. Gunkel
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Feb 5, 1996
Inventor
Louis T. Gunkel
Assignee (at issue)
FMC 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.