Granted Patent
Utility
US 5,664,621 · App. 08/703,512
Pre-stressed membrane basket cover assembly
Inventor:
Mark E. Brophy
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Aug 27, 1996
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.