Granted Patent
Utility
US 5,485,877 · App. 08/330,923
Rotary regenerative heat exchanger
Inventor:
Mark E. Brophy
Patented Case
View Patent ↗
Granted: Jan 23, 1996
Filed: Oct 28, 1994
Inventor
Mark E. Brophy
Assignee (at issue)
ABB Air Preheater 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.