Granted Patent
Utility
US 4,126,300 · App. 05/872,991
Hood for steel processing vessel
Inventor:
Henry A. Oberhelman
Patented Case
View Patent ↗
Granted: Nov 21, 1978
Filed: Jan 27, 1978
Inventor
Henry A. Oberhelman
Assignee (at issue)
ESCO GROUP LLC
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.