Granted Patent
Utility
US 4,537,157 · App. 06/508,713
Vertical, collector-type high-pressure feed water preheater, with a desuperheater casing
Inventor:
Gunter Volks
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Jun 28, 1983
Inventor
Gunter Volks
Assignee (at issue)
BBC Brown, Boveri & Company Ltd.
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.