Granted Patent
Utility
US 5,637,281 · App. 08/398,593
Process for the removal of from oxide coatings iron zirconiferous material
Inventors:
Keith Mayes, Douglas W. Selby, Steven K. Gilman
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Mar 3, 1995
Inventors
Keith Mayes
Douglas W. Selby
Steven K. Gilman
Assignee (at issue)
RGC Mineral Sands
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.