Granted Patent
Utility
US 5,445,667 · App. 08/256,575
Method for reducing material containing metal oxide in solid phase
Inventor:
Rolf E. Malmstrom
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Jul 18, 1994
Inventor
Rolf E. Malmstrom
Assignee (at issue)
A. Ahlstrom 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.