Granted Patent
Utility
US 4,880,447 · App. 07/275,229
Method and apparatus for steam flow venting incorporating air educting means
Inventor:
Christopher J. Bloch
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Nov 22, 1988
Inventor
Christopher J. Bloch
Assignee (at issue)
Naylor Industrial Services
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.