Granted Patent
Utility
US 5,989,430 · App. 09/107,327
Method for eluting antimony adsorbed on chelating resin
Inventors:
Kazuhiko Motoba, Katutoshi Narita
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Jun 30, 1998
Inventors
Kazuhiko Motoba
Katutoshi Narita
Assignee (at issue)
Nippon Mining & Metals Co., Ltd.
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.