Granted Patent
Utility
US 4,345,920 · App. 05/947,211
Vacuum deaerator
Inventor:
Louis Ross
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: Sep 29, 1978
Inventor
Louis Ross
Assignee (at issue)
BorgWarner Inc.
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.