Granted Patent
Utility
US 4,509,976 · App. 06/592,134
Production of ferroboron
Inventor:
Adolfo R. Zambrano
Patented Case
View Patent ↗
Granted: Apr 9, 1985
Filed: Mar 22, 1984
Inventor
Adolfo R. Zambrano
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.