Granted Patent
Utility
US 5,048,595 · App. 07/663,359
Rotary regenerative air preheater basket sealing
Inventor:
William F. Harder
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Mar 4, 1991
Inventor
William F. Harder
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.