Granted Patent
Utility
US 4,444,812 · App. 06/172,509
Combination gas curtains for continuous chemical vapor deposition production of silicon bodies
Inventor:
Henry W. Gutsche
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Jul 28, 1980
Inventor
Henry W. Gutsche
Assignee (at issue)
Monsanto Company
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.